So what do you do if you need to take the ph down in your aquaponics system? to lower ph we recommend certain acids, such as nitric, muriatic, and phosphoric. our preference is phosphoric ( aquadown ) because it is the safest of the three acids (it is an ingredient in cola drinks) and it adds some phosphate into your system, which your plants will like.. Lowering ph in aquaponics systems. as you might remember lower ph is more acidic. here are some safe additives you can use to lower the ph of your aquaponics system. ph down; hydrochloric acid 1 or 2 caps per 250 gallons; acetic acid (vinegar) sulphuric acid; maidenwell media or diatomite (5.2-5.8) iron sulfate fertilizer. A very low carbonate hardness could result in an extremely low ph which will kill off most bacteria. for an aquaponic system, the optimal kh level is anything above 4.0 which ensures that a high buffer potential is maintained for a more stabilized ph. the kh level of an aquaponic system can be measured using a designated water test kit..
Lowering ph in aquaponics. high ph is a common concern among beginning and intermediate aquaponic growers, who want a quick fix to bring it down. my philosophy on lowering the ph in system with high ph is simple. if you’re thinking about using a chemical or acid to lower your ph, don’t.. Our science class tried starting an aquaponics lab and we had 49 out of 50 fish die in 1 week. we found that the ph level was at 9.0 so we tried to balanc it out using acids and it went back to 7.5 ph within 24 hours it was at 9.0.. Using shell grit to control low ph a few days ago the ph in our ibc display system started dropping and i started adding small amounts of hydrated lime and potassium bicarbonate, alternating every day. i was managing to get the ph up from 6.0 to 6.3-6.4 each day, but yesterday morning it had plummeted from 6.3 to 5.5 overnight..
