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Re: NFC: Re: Another Filter/Aquarium Question

To prevent having your UG dug up, lay eggcrating over the UG. The thickness of
the eggcrating will always provide that thick of a gravel bed.


Chris Hedemark wrote:

> > Are undergravel filters a necessity?
> No.  In fact, in some tanks they don't work at all.  Many cichlids and some
> centrarchids will rearrange their tanks, exposing the UGF plate and
> rendering it useless.
> But where it can be used,  I think it is an economical and natural way to
> help keep the water clean.
> > In large tanks can you get away with
> > just a gravity fed wet/dry system that just pumps the water back in the
> > tank?
> In reef tank designs this is the preferred method by many.  No UGF at all.
> If there is ANY substrate, maybe a little living sand.  Many public aquaria
> use this method as well for all but the smallest of displays.
> > My concern is areas of stagnant water that an undergravel filter would
> cure.
> This is a common concern and the way around it with the tank design that you
> propose is to strategically place powerheads in the tank, hanging loose,
> such that they promote flow in the areas that would otherwise be dead spots.
> > I plan on running the return line down the length of the hood and drop the
> > water back in at the other end of the tank.
> How about capping the PVC and drilling small holes in it the length of the
> hood so that the water is evenly distributed throughout the tank?
> Please let us know as you get the photos up, as this sounds like an
> interesting project.

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