Usually only partially submerged. Currently about 1500gph. I just have a pipe coming through the wall and feeding into this tank. This was never meant to be long term it was just until I got everything set up. But it's been 3 years now. Long story short I was going to build a plywood tank for these fish I had the plywood before I moved 8 sheets of 3/4" birch and I don't know how many 2x4s, and the front and back panes from a 225. I actually was going to build this at my other house but I got divorced instead...lol
Hurt myself while moving, left the wood, glass there then COVID happened and now plywood is double the price it was.
I originally had sharks in this years ago. This one drained into another 300g stock tank with angels and a puffer. Then into my sump system. I lost the other 300g when a large tree branch fell on it. After I sold off all my stuff last time I kept these and the 3 100g tanks. This one and two of the 100s where in a shed the other one and the 3rd 100 were under a tarp next to the shed. A 1/1000 shot dropped a 4" branch from the tree right through the two under the tarp.
I thought these looked big a long time ago. When you see a 36" bamboo cat in one they no longer look big. Your sharks will out grow this. I wish someone would have told me that when I did this. I knew deep inside but I lied to myself. I was sad when I sold them off not because I didn't make any money (I sold them for less than I paid for them originally) but because they were so cool and I could hand feed them and pet them they were some of the coolest fish I've owned. The coral cats were fine in there probably for life but they were more skittish. Cool looking but not interactive. You probably know this but just thought I'd give you my story.