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So i have a bunch of tanks, and all of my turtles have friends (2 in each tank, 150 gal tanks, 4 tanks) but in the 4th one, i have a mississippi map turtle (female)
what other turtle do you guys suggest if any?
Filter: Fluval FX6 (In all my tanks)
Heated: Yes
i dont really know where to put this thread but feel free to move it around mods!

What are the species/sizes of the other turtles? Are they paired off for a specific reason?

not really for any reason. i just feel that they should have someone to be with even though it may seem unnecessary or silly
they are pretty much all female
1st tank: 2 eastern painteds
2nd tank: 2 res (they are beasts lol)
3rd tank: 2 diamond back terrapins
4th: mississippi map.
so any suggestions/ if any?
maybe another slider or maybe a musk turtle?

All adult male sliders should be kept alone and a good majority of female RES too. What are their genders?

okay quick change in topic:
i went to my local shelter and they have a full grown MALE red eared slider. its actually pretty small, around 6 inches.
it came from a pretty bad place, and the adoption fee is only 20$. They have it in a tank with other turts that are not for adoption and he doesnt seem aggressive what so ever.
can this be a good option for my female mississippi map?
if it ISNT i will still adopt it and setup a whole new tank lol.
another question which may sound like a really stupid question is, is it possible for them to cross breed? i dont want that to happen

Yes, they might crossbreed. As for the male's behaviour, it will change and once it does you cannot change it back.

ok so it seems i want to rule out having another turt for this map turtle.
what kind of fish do you recommend that are medium sized and WONT hurt the turtle, cause i do know some fish will bother the turtle.
the turtle eating the fish is not a problem to me. i have like 2 gouramis in there right now, do you have any fish in your tanks?

I don't keep fish around and anything in the tank has the potential to be eaten. Fish larger than your RES will likely be nipped at until the end. Small, fast fish with hiding areas are your best bet.