I built a 320 gallon tank in 2001 or 2002. I used the instructions and methods on the GARF website. I used oak veneer plywood, set it up as a planted tank, and it is beautiful if I do say so myself. My son used it a a senior high school woodworking project, and his shop teacher could not...
OK I am going to stick my foot in it here by going against the norm, but have have had quite a bit of experience with Clown Loaches. I have lost them using DIY CO2 in my 340 gallon planted tank. You can lose them in a 125 Gallon tank with DIY CO2.
In your case however I am not sure why you...