Here are some notes on lowering ph in your aquaponics system. adjust ph slowly! the most important thing when adjusting ph is to do it slowly. if you lower ph too much too fast, it could stress your fish or plants and kill them. ph should be lowered over a week or more, not sooner. murray from http://www.aquaponics.net.au says that testing ph is one of the most important things you can test and stay on top of.. Potassium bicarbonate (khco3) also has a pretty long history in aquaponics as a commonly used, and safe way to raise your ph and buffer your system water. it’s also fast acting and does the job it’s intended to do right away (unlike some very slow dissolving things like eggshells, shell grit etc)….
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