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Mike M:
Thanks for posting the article, very informative... I remember reading an article where the breeder claimed that concrete ponds were good for sumi development... Concrete: SAND, rock and cement...makes more sense now...
Here's the conundrum, many new concrete ponds are being sealed with epoxy compounds to better control pH... So I would guess that this cancels out the beneficial effects of concrete ponds...
I guess the solution would be like Dick suggested, but instead of a sand filter, add another of Steve Castel's blue bins filled with sand in bags...
Thanks for spending more of my money... Between you and Dick I may have to go back to work...The last time I read one of your posts, I had to go out and buy a nitrate test kit...Thanks to Dick and Maurice, I now have a bakki type shower...
Aloha! Mike
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