Jess Posted October 17, 2005 Report Share Posted October 17, 2005 All you planted tanks with Co2 wizz's out there, I have problems I made a DIY Co2 unit last night and it started to bubble within 30 mins. Last night I positioned it under a terracotta pot as it was closing on midnight and I didn't feel the need to get my arms wet. Today, I positioned the tubing inside the inlet valve of my cannister, so to get better c02 dispersion. A few hours later I checked my pH, it was 6.8 it had dropped from around 7.1.. I wasn't too concerned yet, although I knew the pH was going to drop even further tonight when the lights were out (when the plants stop needing Co2 and they need O2) By tea time I was beginning to worry about the fish at this stage, they already had a slight pH drop, more to come.... So I removed the tubing from the inlet hose and I placed an airstone on the bottom, so less Co2 dispersion too lower the chances of any greater drops tonight. Now, 4 hours later the pH has drops down to 6.2! Now I am worried! even though it is night now and I am expecting more of a drop, still! Do I add some crushed coral to help buffer the water so not to cause such a large drop again? as I am lowering the kH further by injecting Co2. (I have read theories for and against raising the kH to try to help keep the pH from swinging so drastically.) I do not know what the kH is out of the tap, but I am guessing it is low. Any suggestions? Tank 50G pH was 7.1 GH 8 Substrate - River sand Co2 is DIY with not regulator bubbling at a rate of 1 bubble per second. Thanks ;) Link to comment Share on other sites More sharing options...
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