So today's the day. Buying a 220 gallon today. What rays are typically pleco safe? My LFS carries BD and marble, those typically pleco safe? Also, if I want to get rays in 6 x 2 x 2.5 what should I use on bottom? Sand? How much driftwood is good? Anybody has any tanks that have rays in 220 gal or plecos in it, send picture in this thread so I can see an idea. Looking to add gars, catfish, black aro and possibly some puffers and other oddballs along with rays and plecos. Can't wait
Hello, and congrats on getting your tank.
I too have a 220 6x2x2.5 and actually had a lot of the same questions you have. As far as rays go, the general rule is that you want to at least have a tank that is at least twice the width of the ray's full grown disc size, and you want the tank to be 3-4x the length of the ray's full grown disc size. I too really wanted a ray in my 220 but after researching I came to the conclusion that a 220 is not really suitable for any rays long term. This is because the smallest rays available, such as the hystrix, marble motoro and reticulated rays, still can reach a disc size of 16-18". This means that you really need a tank at least 3' wide and 6' long. The 220 is long enough but it is just not wide enough.
Also, I believe black arrowanas can potentially reach near 36-48" when fully grown, which means that they are not suitable for a 220 either. This is another fish that I really wanted for my 220 but decided against due to the size of tank that the fish will end up needing being much larger than the 220.
As far as catfish go, the 220 can definitely host many species of catfish. Just do your research on the type of catfish and make sure it will not get over 18" or so when fully grown. Unfortunately, this means no red tails.
I'm not very familiar with gars so I will let someone else speak about whether or not any species are suitable for a 220.
I decided to go with fire eels for my 220. I currently have two at about 11" but I may still need to go down to one if they don't end up getting along when they're older. I've had them since 4". I also plan on growing out some discus and adding about 8-12 of them to the tank. That will be all I plan on keeping in it.
Good luck with your tank and keep us posted what you decide to keep in it.