Hi to all.
I've just bought an empty tank, really cheap because it had been drilled wrong.
It's supposed to be 170l or 37 gallons for those in the US (sounds much bigger in litres if you ask me!)
Also since I started typing this I bought a tank off eBay to convert into a sump Fish tank 60 litre | eBay
I have many, many questions about this new build...
I have previously converted a Fluval Edge 46l into a reef tank, building an overflow box and weir, plumbing it, and converting a small tank into a sump. So I'm not a complete noob, but I am now very aware of the value of planning ahead, due the huge amount of mistakes I made on that build.
The first question is this: the tank is drilled with 2 x 25mm (1 inch) holes at the top and near the corners. Will these provide enough flow to build either 2 overflow boxes or 1 box all the way across the back of the tank?
I was thinking about 1 long overflow box externally with a herbie style system and 2 weirs inside the tank.
I've attached a few photos that hopefully help with answering this.
Cheers in advance