[quote author=Euphyllia link=topic=4375.msg53161#msg53161 date=1219277620]
I have done test, but i thought the water change was supposed to be every 4 months but then i found out it was every 2 weeks. so im going to start doing that. I did the last one last week and the next one is this week. that might be it.
[/quote]
if you can do 10% weekly, it will do wonders in exporting nutrients and also keep your system nice and even.
Cheers,
Josh