I had a kazillion seed shrimp in my 20 gallon shrimp tank, which was one of the deciding factors in redoing the tank. My tank is now a bare bottom concept tank. Here's a pic. I have noticed a small number of seed shrimp roaming around on the driftwood/moss and some on my prefilters occasionally (I get a few every time I clean the prefilters). I believe they are the few that survived the switch or they came in on the new xmas moss (got the original seed shrimp from my LFS with plants). My question is this. I know seed shrimp are detritus and leftover eaters. I only feed my shrimp every other day and they eat it all by the time I wake up the next morning. I only feed them about 1/3-1/4 of an algae wafer and one large omega one pellet split in half each time I feed. I do feed the neons in the tank small pellets every day and a few may hit the ground, but my amanos make quick work of them. Also, I routinely (twice a week) vacuum up at least 90% of the detritus on the bare bottom. I've never actually seen any seed shrimp sifting through the detritus on the bottom. Is that enough to keep the seed shrimp population in check? I don't mind a few seed shrimp here and there, I just don't want another infestation.