obrien.david.j Posted March 27, 2022 Share Posted March 27, 2022 A picture tells a thousand words. I ran out of CO2 gas 1pm Wednesday, May 23rd. Replaced the tank Friday around 1pm. Decoder, I have my Neptune control the CO2 on my Ca Reactor. If Trident reads Alk < 9.0, turn on the gas. A pH probe is stuck in the effluent/output of the Ca Reactor. Target of Effluent pH around 6.3, with Neptune controlling the C02 solenoid. Over the two days without gas, Alk drifted from a low of 8.9 down to 8.2. In the day and a half after replacing the gas, Alk has come back up to 8.4. Seems to be rising slower than it fell. Hmm Quote Link to comment Share on other sites More sharing options...
obrien.david.j Posted March 29, 2022 Author Share Posted March 29, 2022 Follow-up. It Alk dropped for two days, without CO2 gas. It has taken approx 3 days for Alk to recover to 9.0 once gas was restored. Interesting, but I'm glad the swings didn't happen that fast. Quote Link to comment Share on other sites More sharing options...
goldenbasketreef Posted March 29, 2022 Share Posted March 29, 2022 What media are you using because your effluent media very low PH I use reborn media that require 6.8-7 to melt it so my effluent may be about 6.8 When I use other media that is more dense and hard I have to melt at much lower ph 6.0-6.3 Quote Link to comment Share on other sites More sharing options...
obrien.david.j Posted March 29, 2022 Author Share Posted March 29, 2022 I originally used ARM coarse, which is where I set my Effluent pH target. For the past three years, I've been using Reborn. And I haven't worried about adjusting the pH target. Quote Link to comment Share on other sites More sharing options...
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