I wanted to introduce myself and my group of turtles and hopefully get some advise.
I have 3 RES (2 females that are both 9 inches
and 1 male 
that is 8 inches) that I have had since I was 7 (about 12 years). 
They started out small but have grown into monsters. Over the years I have replaced the aquariums to larger and larger ones, based on the space I had and what I could afford. Currently, they are in a 48x18x18 tank filled 3/4 with water (~50 US gallons). I have a Rena XP4 filter that I clean every two weeks and I do a partial clean of the tank every month and a full clean once every two months or sooner if needed.
I know the aquarium is too small but until recently, followed advise I was given growing up and never really questioned it because the turtles had room to swim around and looked happy. I recently started researching RES online due to a turtle fight injury and I know I need a bigger space for them. My problem is that I live in an appartment atm and space is at a premium and cash is in short supply.
I would like to hold off until I cab buy an actual house and get a rubber stock 300gallon indoor space set up for them, however my male was recently the victum of a bad bite by one of the females, and the other had laid eggs in the water. The aggressor is currently living in my bathtub away from the other two.
I know that up until now I may not have been the best turtle parent, but I am willing to learn and do better. What would you recommend I do in the short term, and long term inorder to make things better for my crew of RES?
Please, any advise or suggestions would be greatly appreciated. I would prefer not to adopt them out if possible.
Thanks again!
