Re: Replacing bio balls ? My tank has been up and running for about 4 weeks now, but it was started with some established rock and water from an old tank. wasnt sure if it was too late to change to the ruble rock or not? Ive got my clean up crew and three fish in it already so it might not be worth the risk?
ya let me know how making your own filters go, cause im paying 8$ for two and i have to change it about every two weeks |