API® Niquid Nitrite Test Kit Flow Rate at 5 Feet of Head_4470 GPH means they cannot leak oil

means they cannot leak oil into the pond

right down to PVC glue

Specially Formulated To Promote Fish Health

For optimum results

It has time controlled

API® Niquid Nitrite Test Kit Flow Rate at 5 Feet of Head_4470 GPH means they cannot leak oilDetermines Amount of Toxic Nitrite! Reads levels from 0 ppm to 5 ppm Determines the level of nitrite high nitrite levels may cause pond fish to suffocate and die Nitrite is produced in the aquarium in the forms of fish waste, uneaten food, and by nitrifying bacteria in your aquariums natural cycle as it breaks down ammonia. Low levels of nitrite inhibit respiration and suppress the immune system, while high levels cause suffocation in fish. The API