I have a 100 gallon size tank for my RES and she seems to be very happy and healthy. I also have an algae eater, a crawfish, and two rosy minnows in the same tank. A week after I clean the tank, the water turns a murky whitish color. How can I keep the water crystal clear for all my critters? I change the filters about every two weeks. Any advice would be most appreciated. Thanks!
I keep the tank pretty full, about 3 inches from the top. My filter is a Penguin 350 BIO-Wheel Power Filter made by Marineland for up to 75 gallons. I use Tetra EasyBalance water treatment but it doesn't seem to do any good.
The filter is probably your problem. Turtle tanks need a filter for about 3 times the gallons actually in the tank. A filter made for 75 gallons in a 100 gallon tank probably isn't going to cut it. You should really invest in a larger filter. I don't really have experience with big filters- maybe someone who does can give you some more advice.
-Tinkerbell 2 1/2" RES
-Mack 3" RES
-Franklin 3" RES
And yes you need a much more powerful filter. For a 100 gallon tank you should be using something like the Rena Filstar XP3 at least.
I would also take the crawfish out. Remember anything in the tank will become lunch for the turtle. The shells on the crawfish could hurt her when she eats it.