Hey, I had 2 blue legs in my 32 gallon biocube and one just died unexpectedly. Woke up to it dead in the sand out of its shell. Both have been eatting and I have extra shells in the tank. I dose iodide to try and help with molting - any advice or help? I dont wanna keep buying them if they die fast but I do really like the little guys. I know things happen but still sad!