Um, what?? Have I used a gravel vac complete with the tube attached to the hose? Is that what you're asking? Yes. Yes, I have.Have you tried using the gravel vac attachment so the flow velocity is much lower?
In response, please review the thread where an answer has already been provided:Not a personal attack to the poster, but why would you want a bare bottomed shrimp tank? I read that and have tried to figure out the 'why' but am stumped.
I keep a bare tank bottom right now and leaving a film of shrimp crap bothers me. Some time soon I hope to convert my shrimp tank into a Diana Walstad tank (complete with potting soil) and then I won't worry so much about leaving solid waste but now, with a bare tank bottom, I don't like leaving all it to just sit there and build up.