my friend got a leather a few weeks back. his tank has undergone a shocking event, so i told him i would hold onto it for him untill his tank gets back to normal. im my tank and his for all i have seen it doesn't extend (open up), but some of the pylops extend. it has developed a little hole i nthe middle. and apears to be tearing. im lost i have no idea what is wrong. it is in a 75 gallon under 250 watt 10 K XM bulb. my water is fine and everything else in the tank is doing well. what could the problem be? thanks in advance