[scolley]

Thanks Laura, but I assume you mean using that as a type of root ball. If so, sounds like a great way to keep iron out of your water column. But, that would be a bit tough in this tank. The substrate is all sand, with no plants in it. All the plants are in shallow pots of Aquasoil, covered with sand. I COULD cram some root balls into the pots. But it would be tricky, as I try REAL hard not to disturb the soil under the sand (AS wants to rise above the sand - like big kernals of popcorn in a bag - same principal, big bits come to the top).

BUT if it turns out that the Fe reduction makes a big difference, it would DEFINATELY be worth the trouble, because regular tank wall scraping is a major PITA and time sink.

So, just in case... how do you keep those laterite balls together? What binds them?

Thanks.