Water Chemistry
Hanna Checker Phosphate ULR Review: Low-Range Phosphate Testing for Reef Tanks
An overview of Hanna’s ultra-low-range phosphate checker and where it fits in a reef testing routine.
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Reef keepers who grow SPS corals usually aim to keep phosphate low but not at zero, which calls for a test that can read small concentrations. Hanna’s Checker ULR is a handheld digital colorimeter made for that low range.
Workflow
Test on a regular schedule and log the readings in the Water Parameter Tracker. If phosphate trends upward, feed less or add phosphate-removal media.