Thanks Ebony.
Unfortunately my frog died last night. I'm thinking perhaps it was a parasite for I cant think what else could have caused it to get sick. My other one is fine, currently climbing up the back wall. They are so small so the only food I have feed them is wingless fruit flies - being smaller than their heads. I will get some white worms for my remaining one as it must be bored of just fruit flies and I do what to provide it with a varied diet.
I think I'll get a tadpole and raise it myself so I know it will have that best start to life, and so my other one has a friend.