Overflow box system?

Question

I have a 30 and a 20 gallon -- glass tanks, tall. In the interests of stability and no more cyanobacteria, I want to chain them together, with the 20 as a sump and refugium.

Neither is drilled, so I would need to use an overflow box. Anyone have experiences, suggestions with these devices. I read at wetwebmedia mixed things. Some say they are floods waiting to happen.

What sayeth thou?

magic -- thanks, boss. the 20 will also be a 'fuge. Also, I'm tired of cyano. I'm hoping 50 is a magic number (no pun intended)

Answer 1

What you are describing is commonly called a wet dry filter system. You an find plans to biuld one all over the web as well as parts and supplies. I have use wet/dry filters on frshwater and salt and thing they are a very good filtration system. Building a wet/dry system is not hard at all, but there are lots of design considerations, all of which you must consider very carefully when building a wet/dry. Example, your system must allow adquate water to drain from the tank to keep up with the pump returning water of the sump will go dry. There is far too much to building one of these filters to go into all of it in one of these type posts, so really do your research. A good start would be to visit a few aquarium stores that use wet/drys in the shop tanks. Ask to look at them and ask questions, most shops will be glad to answer your questions and if they aren't then you are in the wrong shop!

Also design considerations are what keep this type of fiter from being a flood waiting to happen. If properly designed and built, your very worst case would be only 3-4 gallons lost on the floor and I stress that's the worst case.

Read up very carefully about them before you start the project and you can build one for a very small amount of money that will do a great job for years and years. I doubt you will need anything as large as a 20 gallon for the sump though. A 5 gallon would be very adequate for a 30 gallon tank.

Answer 2

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