I just purchased a used 265 gallon acrylic tank with center overflow and not sure how to plumb it. I've only been in saltwater for a couple of years and started small. My current tank is a 100 gallon with center overflow and sump/refugium in cabinet, pretty straight forward, came with plumbing.
The 265 looks like it was made by an individual (not the person who sold it to me). I will attach pics. The cabinet was clearly not used to house a sump or filtration system as it has four sections and a back and no access for hoses. It must have been plumbed through a wall to another room or basement I'm thinking.
I'm hoping for those who have been in the hobby forever, it will be clear how it was plumbed and someone can point me in the right direction. I do have a place to set it where I can plumb it through a wall into another room.
There is a hole at the bottom right of the display front side of the overflow and another on the right side near the top. There are two ball valves in one section of the overflow. I'm guessing one for return and one for sump with the top one being for return because it looks like it could come in then do a 90 degree turn and through the hole in the right top side of the overflow maybe. Don't know what the hole near the bottom of the overflow is for. That would more than likely be covered with sand???? then the second ball valve is to take water out of tank to sump??? The other section almost looks like an internal wet/dry filter. I can take more pics if needed. I really need some guidance on this. I have a 55 ready to modify for the sump. Have already done one of those for my 100 or should say hubby did it. Plan to do a little differently this time though to leave more room for skimmer and less for fuge area.
Any help would be greatly appreciated. Hubby is willing to help but I have to tell him what I need him to do.