actually only panaques need it in their diets. bristlenose just eat whats on the wood.I have a baby bristlenose pleco in my 10g until he outgrows it, and will then move over to the 50 gallon. Plecos do need drift wood, they chew on it. You don't need a big piece for something the size of a clown pleco- I literally found a downed branch from the maple tree in my back yard about 10 inches long, and maybe 1/2 inch around with a little fork at the top, that had been stripped of all bark, and weathered- brought it in, boiled it in water for the better part of the afternoon, and it is now in my tank and doing just fine. All you need is a small branch. My pleco hangs out on it all the time. You can look for small driftwood branches on the riverbanks, too- just boil them for a bit before putting them in your tank.
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