About a year ago, I installed and put together a 250 gallon Rubbermaid holding tank/water trough to create a bog filter for my small 8'x6'x2' koi pond. There are only 3 koi and a crapload of mosquito fish residing. The pond is covered by around 50% water lilies and there are a couple of ribbon grass plants submerged. The bog is made up of 3 inlet pipes on the bottom covered by cut up milk crates. On top of that is a layer of 6 in or so rocks followed by 3 in followed by 1 in and then topped with pea gravel. I planted Canna and water iris and pennywort and a couple of other low flowing plants. The plants have since exploded. Get to the point, Alec!!..sorry. Ahem! I noticed a few months ago that my water loss was increasing. And it continues. Welp!! I think I found it! And it doesn't look good. The Rubbermaid tank is beginning to split vertically from the bottom traveling up. Does anyone have any idea on how I can stop this split and/or repair this Crack? I'll include pics as a reply. I should've taken pics first and then create this post to attach the images. But I'm using g my phone to post this and I will lose all this text if I close the browser to take pics and then...ah! You know what I mean