Help with filtration of 2000 liter tank

[Steve_89]

I would use a long low plastic box (or glass if your a handy DIY) placed above the tank with a low standpipe drain in the bottom at one end. Use a powerhead with hose to pump up to the box with a spraybar or drip plate to distribute water over a prefilter then bio-media to create an overhead wet/dry filter. It will drain back into the tank via standpipe. Keep the standpipe water height low so you have more trickle filter volume. The filter can be as big/small or as tall/long as you need and there is no need for a sump or need to drill the tank. Also no need to calculate sump volumes, pump head heights, bulkhead diameters etc and the chance of an overflow is almost zero since the filter is over your tank which is easy to access and clean.

I would use 2 of these for backup since they are so cheap. As with any wet/dry you can choose what media, how much mechanical filtration etc.

These filters are great but than can be quite unsightly.

With a wet/dry you can hide it under the tank.

 

[shocker]

That dont matter to much. Since its in the garage.

 

[fishdance]

I use glass and build them into my light box. You dont even know its there. On wide or long tanks the overhead filter can be less than 10cm tall if you wish and doesnt need run the whole length of tank.

While under tank trickles are good, I feel the overhead does a better job aerating and cooling the tank for HOT Australian summers since its ON the tank. Anyway, its the cheapest, effective and a very reliable type of filtration.