Corner Overflow box and plumbing question

[babyjess210]

Hello
I just purchase a use 50 gallon tank but it doesnt have any overflow box and plumbing. Can i just buy a corner overflow box somewhere online and what size bulkhead should i run for the drain?
Thanks
Kenny

[dtbradly]

Well the bulkhead size will determine your drain rate, which will also determine yuor pump size and the gph going through your tank. With a tank that size i would say something around 1 inch would do well. You can buy overflow boxes online or check the local reef club for something who does acrylic work or you can DIY, which is always fun.