Ditto. Plus raphael catfish will also need more than 22g just for themselves. And it's best not to mix them with plecos unless it is a very large tank because they are both territorial bottom dwellers. I know how hard it is to limit yourself when there are so many cool fish but only a small tank. My best advice would be to check out the local ads and Craigslist to find a good used tank that is at least 55g. I really don't recommend anything less than that for a decent community. For species only tanks, you might be able to go smaller as there are many fish that can go in smaller tanks, but it's hard to be able to get a combination of fish that can all go in the same tank and be compatible.
