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Originally Posted by Flusher
Doesn't it just dissolve into the water column, then gets removed by water changes and skimmers? That was always my understanding, coming from my freshwater experiences (minus the skimmer part, of course). Once I got into planted tanks, I quit siphoning the substrate completely. I never had a problem.
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Its the detritus that settles and build in piles where the current cant keep it suspended. I would say the organics would be in the water and removed by skimming ,{which also removes visable detritus}, and water changes.
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My nano tank has been running for a year with a 1.5 - 2" sand bed that I've never siphoned. I've never had nitrates register yet.
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I never had a nitrate problem with a dsb, as its excellent at denitrification. Its the build up of phosphates in the sandbed, as in detritus piles in barebottem, or in the sumps or in partical filters, like filter wool or the socks used now. Thats why they need cleaning on a regular basis.
It should also be noted, although I run bare now,
{sounded funny}, I still see nothing wrong with running a shallow or dsb if one wishes. Its just that they also require maintance to keep them functioning correctly and not just a bunch of costly items from an lfs.