On my tanks 10 gallons and up I change about 40 - 50% a week with no problems. On my 2 gallon tank with a betta I change about 240% a week with no problems either.
Originally posted by Luca Brazzi
Does your betta tank have a filter? Mine doesnt. Its amazing how much ammo bettas can tolerate. Theyd be a great fish to used for a fishy cycle if you put some dividers in the tank. I still change his water quite often though, 90% every 2 weeks.
Originally posted by jiggerpolebill
RTR - if you or anybody else are expecting any of this to be backed up with any scientific references, you can forget about it. his beliefs are all he needs for evidence and they should be enough for you as well.