I have a 2.5 gal tank (unfiltered) with a male crown royal betta and a nerite snail. They get along pretty well, but since I've gotten the snail, I've had some water problems. I noticed small, stick-like white things in the substrate and have had white dots on the tank and decorations. Also seen worms as well. I've scrubbed the tank and accessories, done water changes and cut back on Blue's food. This has occurred 4 times in the past 2 months and I'm getting frustrated. Are there any cures out there that anyone can suggest? Its not the water itself, we have 3 other tanks that have no problems. Could it be the snail?