I just brought home my used Fluval Edge. I went to add the new sand substrate by putting the bag in like I've seen, but then I realized that there was no way I'd get the back gracefully to the bottom with that small of an opening. I ended up just dumping the two 5lb bags in, and of course, the water is extremely cloudy. I have the filter running, and the two clowns and shrimp are in separate plastic containers. They've probably been in those since 5:30 or so (it's 7:30 right now). I'm not sure what I should do now. =[