So, short story long, I happened about two RES’s. At the time, both were the same size (if I had to guess, both are currently 4-5 months old). Before anyone says, “turtles are usually solo in the wild,” I know. Just happened they were together when I got them.

Currently, they’re in a temp 20 gallon tank, two filters, UVB/UVA lights, basking dock and secondary rock available in the hot area (I live in the tropics so, heater is not necessary). I do 50% water changes every 4 days, a big clean twice a month. Diet includes two types of packaged turtle sticks, dried shrimp (they will grab it from my hand), grilled chicken (no salt, butter or oil), and I’ve been trying to introduce greens (have included turtle safe live plants that they do nibble on). Calcium supplements have been hard to come by, and I’ve been trying to get cuttle bone with little luck (hoping the shrimp would be okay, until I figure this out).

One is just growing so much faster. I’ve not seen any fighting, or signs of them hurting each other. No signs of shell rot on either, but potentially some pyramiding on the small one. My options are to remove the small one daily (for feeding, and basking), and put him outside in the sun, since I’m not seeing him basking as much, or both for a few hours (I do this anyhow when doing big cleans, and no issues). I’m working on a bigger habitat, as I know 20g isn’t going to cut it, but just asking for some recommendations.

Thanks for the help in advance. This sub has been amazing for tons of great info on care, and keeping these amazing animals. The two i happened to stumble upon (not from the wild) have made our home so much more than it was before. So much so, I’m contemplating getting rid of my beloved fish...