6,800+ results for freshwater test
- FRESHWATER MASTER TEST KITOpens in a new window or tabBrand New$42.25letsbuy2019 (14,909) 98.8%Free shipping
- Freshwater Hardnss Test KitOpens in a new window or tabBrand New$14.37letsbuy2019 (14,909) 98.8%Free 2-4 day shipping143 sold
- 50 Ammonia Test Strips for Freshwater Saltwater Pond Fish Tank Monitor NH3/NH4+Opens in a new window or tabBrand New$13.97cg_enterprises (3,404) 97.8%Free shippingLast one
- 100/50 Aquarium Test Strips Fish Tank 7IN1 PH Water Test Strips Kit Freshwater.Opens in a new window or tabBrand New$9.86 to $11.38Save up to 10% when you buy moreWas: $11.98 5% offTop Rated Plusaseferttsfj02 (10,149) 98.9%Free 2-4 day shippingFree returns113+ sold
- API Ammonia Test Strips Saltwater & Freshwater Aquariums 25 Tests Exp 2/26Opens in a new window or tabBrand New$12.00aang11 (2,289) 99.8%Free shippingFree returns
- Brand New API FRESHWATER MASTER TEST KIT Over 800 tests: Free U.S ShippingOpens in a new window or tabBrand New$38.97greatdealsdealer (3,609) 99.6%Was: $59.95 35% offFree shippingFree returns44 sold
- New ListingAPI Freshwater Master Test KitOpens in a new window or tabBrand New$32.99zeji-98 (2) 100%Free shipping
- 6 in 1 Aquarium Test Kit 100Pcs Test Strips Freshwater Saltwater Fish TankOpens in a new window or tabBrand New$10.50Save up to 10% when you buy morefabara70 (116) 100%+$2.50 shipping105 sold
Picked For You
Sponsored | Top selling items from highly rated sellers with free shipping- API FRESH WATER MASTER TEST KIT, OVER 800 TESTS, SEALED, NEW! Exp 12/2026 & UP!Opens in a new window or tabBrand New$38.50flybuy014 (5,007) 100%Free shippingAlmost gone30 sold
- API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master TestOpens in a new window or tabBrand New$37.88pondandpetdirect (95) 100%Free shipping6 watchers
- 100/50x Aquarium Test Strips Fish Tank 7 in1 PH Water Test Strips Kit FreshwaterOpens in a new window or tabBrand New$9.99 to $11.79Buy 1, get 1 22% off with couponTop Rated PlusFree 2-3 day shippingwomeaq (17,340) 98.8%Free returns
- API GH & KH Test Kit for Freshwater Aquariums General & Carbonate Hardness TestOpens in a new window or tabBrand New47 product ratings - API GH & KH Test Kit for Freshwater Aquariums General & Carbonate Hardness Test$13.99Top Rated PlusWas: $16.46 15% offasap-aquarium (8,611) 99.8%Free shippingFree returns
- API PH Test Kit Exp 10/2028 250 Tests FRESHWATER ONLYOpens in a new window or tabBrand New$9.80aang11 (2,289) 99.8%Free shippingFree returns
- Aquarium Fresh Water Test KitOpens in a new window or tabPre-Owned$20.00doued_10 (72) 97.4%+$5.93 shipping
- 50/100x Pond Test Strips 7in1 Water Testing Kit for Freshwater Aquarium FishTankOpens in a new window or tabBrand New$9.99 to $10.99Save up to 13% when you buy moreTop Rated PlusFree 2-4 day shippingaseferttsfj01 (7,729) 98.9%Free returns
- 7 in 1 Aquarium Test Kit 100Pcs Pond Test Strips Freshwater Saltwater Fish TankOpens in a new window or tabBrand New$10.89gooasis (12,510) 99.8%Was: $16.99 36% off+$4.00 shipping168 sold
- API Nitrate Test Kit (Freshwater & Saltwater) - 90 Tests EXP 06/2028Opens in a new window or tabBrand New$12.00aang11 (2,289) 99.8%Free shippingFree returns
- API Nitrate NO3 Test Kit for Freshwater and Marine Aquariums 90 TestsOpens in a new window or tabBrand New$14.99Top Rated PlusWas: $17.64 15% offreef-shop (25,522) 99.8%Free shippingFree returns
- API LR1800 Nitrate 90-Test Freshwater & Saltwater Aquarium Water Test KitOpens in a new window or tabBrand New$15.00parker_pola (157) 100%Free shipping
- API Ammonia Test Kit 130 Tests for Freshwater and Marine Aquariums NH3 / NH4Opens in a new window or tabBrand New$15.99Top Rated PlusWas: $18.81 15% offreef-shop (25,522) 99.8%Free shippingFree returns
- API 5 in 1 Aquarium Test Strips 100 Tests for Freshwater and Saltwater AquariumsOpens in a new window or tabBrand New3 product ratings - API 5 in 1 Aquarium Test Strips 100 Tests for Freshwater and Saltwater Aquariums$26.99Top Rated PlusWas: $31.75 15% offreef-shop (25,522) 99.8%Free shippingFree returns
- API Copper Test Kit (90 tests) for Freshwater & Saltwater Fish Tank AquariumOpens in a new window or tabBrand New$13.65Save up to 18% when you buy moreplants_n_fins (3,308) 96.8%Free shipping
- Salifert Freshwater Nitrate Test Kit 60 Tests Nitrate (NO3) Profi TestOpens in a new window or tabBrand New$16.99Top Rated PlusWas: $19.99 15% offasap-aquarium (8,611) 99.8%Free shippingFree returnsLast one2 watchers
- 🐠API High Range pH Test Kit Freshwater & Saltwater Marine 160 Tests Exp 2/27 🐠Opens in a new window or tabBrand New$12.00what-u-must-have (14,985) 99.3%Free shippingLast one2 watchers
- API pH Test Kit for Freshwater Aquariums Contains 250 Fast and Easy TestsOpens in a new window or tabBrand New$10.99Top Rated PlusWas: $12.93 15% offasap-aquarium (8,611) 99.8%Free shippingFree returns
- Mars Fishcare (API) Master Freshwater Test Kit - pond aquariumOpens in a new window or tabBrand New$14.63electric.labyrinth (3,354) 99.1%+$8.78 shippingfrom Canada
- API Freshwater Master Test KitOpens in a new window or tabBrand New$38.49Save up to 20% when you buy morekens_fish (24,158) 99.5%Free shipping20 sold
- API Phosphate PO4 Test Kit (150 Count) for Freshwater & Saltwater Fish TankOpens in a new window or tabBrand New$15.50Save up to 20% when you buy morebarja_89 (1) 100%Free shipping
- Seachem pH Alert 6 Month Freshwater Aquarium pH Monitor Continuous ReadingsOpens in a new window or tabBrand New$11.95Save up to 10% when you buy morepet_food_network_online (92,680) 99.8%Free shippingFree returns8 watchers
- RA GH & KH General & Carbonate Hardness Test Kit - FreshwaterOpens in a new window or tabBrand New$16.205% off 3+ with couponbits_n-pieces (2,385) 96.7%Free shipping
- Aquarium Test Tube Holder Rack for API Freshwater Master Test Kit FREE SHIPPINGOpens in a new window or tabBrand New$9.99Save up to 20% when you buy morethefittercritter (6,490) 98.4%Free shipping
- 50pcs Fish Tank Test Strips 7-Way Aquarium Testing Kit for Freshwater SaltwaterOpens in a new window or tabBrand New$10.58Save up to 20% when you buy moreWas: $11.89 11% offhuniny (142) 97.3%Free shipping
- Brand New API FRESHWATER MASTER TEST KIT Over 800 tests: 🔥 Free U.S Ship🔥Opens in a new window or tabPre-Owned$30.00berkie11 (658) 98.4%Free 2-4 day shipping
- Umlecoa 7 in 1 Aquarium Test Kit for Freshwater and Saltwater - 125 Aquarium TesOpens in a new window or tabBrand New$21.95antonyexpress (543) 99.8%Free 2-3 day shippingFree returnsLast one1 watchers
- API Nitrate NO3 Test Kit (90 count) Freshwater & Saltwater Fish Tank TestingOpens in a new window or tabBrand New$15.95Save up to 18% when you buy moreplants_n_fins (3,308) 96.8%Free shipping
- API Phosphate Test Kit 150 Tests for Freshwater and Marine Aquariums PO4Opens in a new window or tabBrand New$15.99Top Rated PlusWas: $18.81 15% offreef-shop (25,522) 99.8%Free shippingFree returns
- API 5 in 1 Aquarium Test Strips for Freshwater and Saltwater Aquariums 25 TestsOpens in a new window or tabBrand New58 product ratings - API 5 in 1 Aquarium Test Strips for Freshwater and Saltwater Aquariums 25 Tests$15.99Top Rated PlusWas: $18.81 15% offreef-shop (25,522) 99.8%Free shippingFree returns
- API Phosphate PO4 Test Kit (150 Count) for Freshwater & Saltwater Fish TankOpens in a new window or tabBrand New$16.47Save up to 18% when you buy moreplants_n_fins (3,308) 96.8%Free shipping
- 100Pcs Aquarium Test Strips Fish Tank 7IN1 PH Water Test Strips Kit FreshwaterOpens in a new window or tabBrand New$11.29Save up to 5% when you buy moreWas: $14.99 25% offstarstartusd (301) 100%+$4.00 shipping192 sold
- RA Copper Test Kit - Freshwater/SaltwaterOpens in a new window or tabBrand New$16.765% off 3+ with couponbits_n-pieces (2,385) 96.7%Free shipping
- API Phosphate Test Kit For Freshwater & Saltwater TanksOpens in a new window or tabBrand New$15.99piccardpets (152,080) 99.6%Free shipping20 sold
- API Nitrate NO3 Test Kit for Freshwater and Marine Aquariums 90 TestsOpens in a new window or tabBrand New$13.99rcjdm977 (6,557) 98.4%Free shipping
- API Freshwater Master Test Kit With Tube Stand And Extra Tube UsedOpens in a new window or tabPre-Owned$20.00northwesternfinds (69) 100%+$15.70 shipping
- 100Pcs Aquarium Test Strips 7 in 1 Fish Tank Test Kit Freshwater Saltwater CVOpens in a new window or tabBrand New$13.39Save up to 20% when you buy moremcainpty (3,731) 98.5%Free shipping
- API 5 in 1 Aquarium Test Strips for Freshwater and Saltwater AquariumsOpens in a new window or tabBrand New$6.98 to $71.19alotofhome (5,922) 99.2%+$3.95 shipping
- New ListingAPI Freshwater Master Test KitOpens in a new window or tabBrand New$35.98arhol9265 (0) 0%Free shipping
- API PH TEST KIT 250-Test Freshwater Aquarium Water pH Test Kit, 4 Piece SetOpens in a new window or tabBrand New$10.79sportingoutpost (3,450) 96.8%Free shippingFree returns
- Aquarium Test Tube Holder Rack API Saltwater & Freshwater Master Test Kit MarineOpens in a new window or tabBrand New$9.95Save up to 20% when you buy moreTop Rated Plus+$1.95 shippingworldofprints (15,253) 98.7%Free returns96 sold
- 100pcs Aquarium Test Strips Fish Tank 7IN1 PH Water Test Strips Kit FreshwaterOpens in a new window or tabBrand New$10.97 to $18.9915% off 3+ with couponautoparts_geeker (7) 100%Free shippingFree returns
- API Freshwater Master Test Kit 800+ Fresh Water Tests pH Ammonia Nitrate NitriteOpens in a new window or tabBrand New$29.99dad_planet (5,479) 99.6%Was: $59.98 50% off+$10.35 shipping
- API Ammonia Test Strips Saltwater & Freshwater Aquariums 25 Tests Exp 2/26🐠Opens in a new window or tabBrand New$15.99what-u-must-have (14,985) 99.3%Free shipping
- Test Tube Holder Rack API Freshwater & Saltwater Master Test Kit Marine AquariumOpens in a new window or tabBrand New$12.95 to $14.95Save up to 20% when you buy moreTop Rated Plus+$1.95 shippingworldofprints (15,253) 98.7%Free returns
- Lot of 2 Packs: API 5-in-1 Aquarium Saltwater Freshwater Test StripOpens in a new window or tabBrand New$9.99achang87 (638) 98.9%Free shippingLast one1 watchers
- Seachem Combo Alert Freshwater PH & Ammonia 3-6 MonthOpens in a new window or tabBrand New$12.29Save up to 20% when you buy morekens_fish (24,158) 99.5%Free shipping51 sold
- Salifert Freshwater Chlorine + Chloramine Test Kit 60 Tests (Chl) Profi TestOpens in a new window or tabBrand New$15.99Top Rated PlusWas: $18.81 15% offasap-aquarium (8,611) 99.8%Free shippingFree returns
- API Ammonia Test Strips for Saltwater & Freshwater Aquariums 25 Tests Dip & ReadOpens in a new window or tabBrand New3 product ratings - API Ammonia Test Strips for Saltwater & Freshwater Aquariums 25 Tests Dip & Read$16.99Top Rated PlusWas: $19.99 15% offasap-aquarium (8,611) 99.8%Free shippingFree returns
- 50pcs Fish Tank Test Strips 7-Way Aquarium Testing Kit for Freshwater SaltwaterOpens in a new window or tabBrand New$10.58$6 off every $30 with couponWas: $11.89 11% offcopnasafyut (2) 100%Free shipping
- FRESHWATER MASTER TEST KIT EACHOpens in a new window or tabBrand New$43.00niftythrifty2k (3,004) 97.4%Free shipping
- API KH Test Kit Carbonate Hardness Test for Marine and Freshwater AquariumsOpens in a new window or tabBrand New$11.99Top Rated PlusWas: $14.11 15% offreef-shop (25,522) 99.8%Free shippingFree returns
- API High Range Test Kit PH Freshwater & Saltwater (160 tests) Fish Tank AquariumOpens in a new window or tabBrand New$12.31Save up to 18% when you buy moreplants_n_fins (3,308) 96.8%Free shipping
- FRESHWATER MASTER TEST KIT EACHOpens in a new window or tabBrand New$45.97kanadaforsale (21,315) 97.7%Free shippingFree returns110 sold
- 100Pcs Aquarium Test Strips 7 in 1 Fish Tank Test Kit Freshwater SaltwaterOpens in a new window or tabBrand New$14.09hotwheelharris1 (381) 100%Free shipping
- API Copper Test Kit for Freshwater & Saltwater Aquariums 90 TestsOpens in a new window or tabBrand New$13.99Top Rated PlusWas: $16.46 15% offasap-aquarium (8,611) 99.8%Free shippingFree returns
- API High Range pH Test Kit Freshwater and Saltwater Marine Aquarium 160 TestsOpens in a new window or tabBrand New$9.50just1morebid (8,513) 99.1%Free shipping
- API 5-IN-1 TEST STRIPS Freshwater and Saltwater Aquarium Test Strips 4-Count BoxOpens in a new window or tabBrand New$10.59boostedstreet (5,805) 97.1%Free shippingFree returns
- Aquarium Test Strips for Freshwater and Saltwater, 5 Pcs of Ammonia Test StripsOpens in a new window or tabBrand New$8.99hogheadsshed (4,380) 98.7%+$5.99 shipping
- API 5-in-1 Test Strips Freshwater & Saltwater Aquarium Test Strips 100 CountOpens in a new window or tabBrand New$33.58Save up to 7% when you buy moreList price: $34.98 4% offTop Rated Pluslittle.family.members (162,480) 99.1%Free shippingFree returns
- Freshwater Hardness GH & KH Test Kit GH &KH test Kit By APIOpens in a new window or tabBrand New$14.58Save up to 6% when you buy morehealthylife.usa (35,121) 95%Free shipping
- FreshWater 5-Way Test Strips, 50ct. New 9/2025Opens in a new window or tabBrand New$7.99trossi01 (646) 98.8%+$3.99 shipping
- FLUVAL GH/KH Test Kit Freshwater Saltwater A7876Opens in a new window or tabBrand New$16.99riftlakeaquatic (12,905) 100%Was: $19.99 15% offFree 2-3 day shipping4 watchers
- API Copper Test Kit For Freshwater and Saltwater Fish AquariumsOpens in a new window or tabBrand New$16.99premiumaq (29,215) 99.8%Free 2-3 day shippingLast one
- SEACHEM AMMONIA ALERT AQUARIUM WATER TEST FRESHWATEROpens in a new window or tabBrand New$12.99riftlakeaquatic (12,905) 100%Free 2-3 day shipping36 sold
- Seachem Ammonia 75 Test Freshwater Saltwater Aquarium Water Test Kit Free TotalOpens in a new window or tabBrand New$9.88Top Rated Plusbennynv (63,083) 99.7%+$7.15 shippingFree returnsLast one3 watchers
- 50pcs Fish Tank Test Strips 7-Way Aquarium Testing Kit for Freshwater SaltwaterOpens in a new window or tabBrand New$10.70$6 off every $30 with couponWas: $11.89 10% offqijufg (365) 98.2%Free shippingLast one3 watchers
- Lot of 2 - Freshwater Phosphate Test Strips 25 count AOpens in a new window or tabBrand New$17.58mustang66_17 (199) 97.1%Was: $21.97 20% off+$6.75 shipping
- Items Per Page