esshup, thanks as always
. Everything you say sounds great but i will ask this again: Con a concrete surface provide a real healthy living place for fishes?
Concrete already provides water-proof. So we don't need the proofing qualities of clay any more. So why don't we just lay regular soil or some kind of gravel over concrete? Doing that won't damage anything but will provide a better place for fishes. What do you think?
