A customer has a cracked Endless Cascades falls box. It's outside of the 1 year warranty, i'm rather surprised a plastic box that cost a couple hundred dollars only carries a 1 year warranty but anyways. He is looking at repairing the crack versus replacing. He found a pond repair product by Sani-Tred products but it looks to be for concrete ponds. My first thought is to use marine epoxy putty, we use this on boats when we are fishing the rocky rivers around here. The distributor said he used several layers of silicone on his. His also cracked and said the are known to crack. Any thoughts?? Thanks.