I found an LFS that had them and will pick them up soon, I got one dropped on me before I left college and just loved it. I will have a total of 3 with 3 guppies in a 10 gal tank. i've looked around and saw some saying fish food and someone told me shrimp pellets so I have some of those. How often should I drop pellets in and should I get samd for em? (I have rocks right now)