The only problem with the holding tank to settle silt is that we need way too much water for that. We have 26 tanks that are I'm guessing around 1000 litres each. We do have critters in most of them now, and the critters wont be fed to others, but are being sampled and counted every day over the entire summer and used in a thesis about carbon flux and sedimentation rates in lakes. Also phosphorus and nitrogen ratios in dapnia under different conditions and in different nutrient level lakes. We could not possibly do the silt settling thing because we need a huge amount of water and we need it almost immediately or we will not have enough time to get enough data for the experiment.
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Krissy - student, ecology/biology major, loves nature! 
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