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Both are good setups, the benefit to bottom drilled is you don't have boxes and plumbing sticking out the back of the tank so you can push it flush up against the wall. The benefit of drilling the back glass is that you can purchase pretty much any tank and drill it and add a box in the back wall, whereas finding a weir and drilling the tank on the bottom is a little harder to find.Im looking at a used 55 gallon acrylic aquarium this weekend and it’s drilled on the bottom. What are the benefits / drawbacks to this? TIA.
Both are good setups, the benefit to bottom drilled is you don't have boxes and plumbing sticking out the back of the tank so you can push it flush up against the wall. The benefit of drilling the back glass is that you can purchase pretty much any tank and drill it and add a box in the back wall, whereas finding a weir and drilling the tank on the bottom is a little harder to find.
here is a picture of the tank. 3 holes drilled.
Those holes in the bottom don’t look to be very useful. Maybe intended for an old style closed-loop recirculating system. Just me but I would patch those holes and drill new holes on the back for a ghost type over-flow. Ideally a good time to buff the scratches out too.
might be more trouble than you want......have you checked craigslist for a complete system
Man I would never have a tank with holes in the bottom. If you get a leak or have a major issue with one of them and don't know it then you lose your whole tank. The benefit to upper back holes is if you have a leak you only lose so much water.
PS I live in the Phoenix area myself and am always scouring the adds for stuff.Thanks for all the input guys! I passed on the tank, as much as I’d like to have it, it’s not worth the risk.