Charles wrote:

I just use dirt. Put some gravel or rocks on top to keep the fish
out. It sometimes clouds the water a bit, but then settles.

what is sold for potting soil here floats, lots of perlite and wood
bark products.

I have read that the Schultz product will break pumps, if that is a
consideration.

Break pumps how? If chunks of it get past the prefilter? Enquiring
minds with this stuff in their ponds need to know!

--
Elaine T __
http://eethomp.com/fish.html '__
rec.aquaria.* FAQ http://faq.thekrib.com