Thank you Lija, it seems to be a very nice forum! Thanks also for the comment on the substrate. The guy in the pet shop recommended this and I knew that it's good to use coconut for them since they can digest that. But I got rather surprised when I put it into the water to swell because there were so big chunks in it. I was worried that it might be harmful for my frog to swallow them, causing impaction. Now I understand there are different types of substrates based on coconut... Thank you! I will buy a proper one today and change. A bit annoyed that the guy in the pet shop recommended this to me. They call themselves experts on reptiles and amphibians...