Double base floor in a fish tank

[Jaxxnz]

hey guy i am just day dreaming on this one,

has any1 ever raise an extra base at the bottom of their fish tank?

thinking of extra base raise about about 50mm so it could drain out all the bad poo

and the left over foods..

think of it, the fish + diftwood are sitting on air :lol: :lol:

[Stella]

Undergravel filter plus standpipe to the surface.

Options:

Stick the siphon tube down the standpipe.

If you have two standpipes, stick a hose down the other (may take two people)

If you have a drain in the bottom of your tank just drain that.

Of course you can't access the area so gunk still build up somewhat.

Gravel vac 8)

[Jaxxnz]

build it by leaving gap so waste flow go straight to the sump, but the BN catfish could go thg. OMG!

[alanmin4304]

If the undergravel filter is working properly the gunge should be on top of the gravel not under it.

[suphew]

Sounds like your describing a plenum with drain system, as idea that was tried out in the 80/90's (?). It never took off, I'm not sure why but assume it just because it didn't work very well.

The idea behind a plenum is to create an area with anaerobic bacteria which will convert nitrate to nitrogen gas, nitrate is the main reason for doing water changes. One of the problems with plenum's is they tend to fill up with silt etc (like UGF's do) so the drain was to let you drain this out