I just bought a 5' X 24" X 24", 150gal tank with appropriate hardware, etc. Intention is to build a full reef with a wide assortment of livestock. The question came up regarding drilling for overflow(s). Some of the options the vendor suggested:
1. Have one overflow in one back corner of the tank
2. Have two overflows, one in each corner
3. Have a single overflow located in the back centre of the tank (have never seen this before but is intriguing, particularly would provides good side views of tank).
Any thoughts from those far more experienced than I (meaning basically everyone!)? Are there other options I should be considering? I have to decide in a couple of weeks when the tank comes in...
I would go with one overflow in each corner for good circulation. BTW, are we talking drilling thru the bottom glass? if so, might want to check to make sure it's not tempered glass - can't drill thru that stuff