Ok, I've just bought a new tank for my 2 terrapins as they've outgrown the old one and I've had a bottle of Tetra Aquasafe and a bottle of Tetra Easybalance free with it. I was just wondering, are these safe to use with terrapins, the same as with fish?

Yes they're safe, but Reptisafe is the conditioner most keepers prefer as it's formulated for reptiles rather than fish.

Easy Balance won't be much use to you, although they claim it "Eliminates frequent water changes", that may be true for fish but certainly won't be for turts.

Ok, thanks for the help! I'll probably go with the Reptisafe then.