hey, I have two res that are abt 2-2.5 yrs old and abt 4/5 inches big. I was wondering if this size is normal for their age? How often and how much should I be feeding them? Also, what size tank should they be in, and what kind of filters are good? Anyone know of a good online place to get inexpensive filters? If anyone cotud help me out with any of these questions, it would be greatly appreciated! Thanks!!

