Hello,
Recently a friend moved away and we adopted her 5 yo RES "Frankie."  We upgraded to a 40 Gal tank from the 20 gal the turtle came with.  Also bought him a friend from local PetCo.  "Trevor" is 1 1/2 yr old RES.  I don't know the kind of filter which came with Frankie and the 20 gal tank, but it looks like it's from a starter kit.  I am researching filters and I am confused.  I don't ascribe automatically to more is better, but something reasonable and within budget.  So my question, if someone may be so kind as to make a recommendation, which filter would be a good investment for 2 Turtles (5-6 in and 4-5 in") in a 40 gal tank which is about half way filled to the top with water.  
I am brand spanking new to this so please be gentle.  
Thank you.  Have a blessed day.
			
		

