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Caution should be excercised
the reusable Freshwater Master Test Kit comes with 4 glass test tubes with snap-tight caps and a convenient holding tub for easy storage
The uniquely shaped disc that sinks rapidly while retaining its shape longer than the competition
and helps resolve algae blooms
Eheim O-Ring 2217 API Caution should be excercisedEheim 2217 Sealing O Ring (1pk) The Eheim filter seals can become loose over time and will need to be replaced to ensure the filter seals correctly We recommend replacing the Eheim main sealing gasket once a year to prevent leaks Fits Filters 2032, 2034, 2036 Easy to replace Replace as needed Genuine Eheim spare part