So my tanks about 2 months old now, noticed the Brightwell Aquatics substrate in my fuge is looking like it needs a cleaning. I am growing chaeto right now under one of the $25 marineland LED fixtures. Id like to add something go stir the substrate. Its about a 1 1/2 inch bed. Its close to 10 gallon capacity. Was thinking of adding 3 nassarius snails and a sand sifting star. What would be the most beneficial?