Oh thats about a 16 percent water change then. Ok thats good. I didnt think to consider the FULL water volume of the setup. lol Mine will be 70 gallons then.
Thats about right 300 or just a bit more. I have just done a 2nd water change and have decided to do it monthly. I tried to go 3 months between and dose inbetween and did not like the way things were looking so I will go back to monthly water changes and not dose in between unless testing dictates a lacking of something. actually it is hard to explain, but, I do most of my stuff by the way the animals in my system look. sometimes I test often (weekly) and sometimes I test occasionally (monthly) just depends on what my digital readouts tell me and how my animals look. more pics soon.
You know what Biff? Get a hang on back fuge or something that will bolster your volume to five more gallons than jhnrb. Or at least get it even with his. IF if IS five more gallons than yours!