A few dumb DIY CO2 planted tank newbie questions
firstly when one mixes up the ol sugar/yeast brew in one's pepsi bottle, how does one store it for 12 hours or so (have spares) closed lid? dish towel over the top?
secondly after you hook up the new brew (about 13 hours old in this case) how long before it starts prouducing?
and last but not least this tank has been set up for a year or more with a java fern (now a java bush) & java moss and since the source water has a PH of 6.8, GH of 1 and KH of 1
I was using a buffer (KH powder raises carbonate hardness 4dkh/72ppm & keeps PH about neutral) so I did a 95% water change and the folling day a 50% water change no buffers, and hooked up the ol 2 2litre CO2 rig and started testing 2 or 3 times a day and after severl days I find the PH seems to be locked at 6.8 but my KH ranges from 7dkh to 10dkh (seems to like 8dhk mostly) seems kinda high CO2 levels from 33.3ppm to 42.8ppm
I know buffers can stuff up your test readings when using KH & PH test kits, but would a CO2 test kit be any better?