Late arrival here. I had about 90 tons placed by a slinger truck over geotextile fabric. I think I only picked up 2 or 3 stray stones so I highly recommend this method over using your back. Now that it has been there for a couple of years it is still in good shape and the geotextile fabric is doing it's job keeping the stone separated from the underlying clay. I was unable to get any tilapia this year which previously kept everything clean so I've been treating with Cutrine liquid and every time I do the algae sinks and turns into a fuzzy grey mess covering the rocks. Any suggestions on how to remedy this problem? Would aeration help?