Biofilters the normal black box type
Biofilters, the normal black box type
The box type filters with loose fitting lids are all gravity devices. In other
words the water is pumped into the box but it flows out under gravity and not
pressure. Consequently the filter is normally at the highest point in the
circuit - i.e. above the waterfall.
If you have a waterfall and it is not convenient to install the filter above the waterfall then distribute the water from the pump so that part goes to the filter that is at pond level and part goes to the waterfall using a separate pipe.
You will need a 2 way valve arrangement like the one below or at least a Y piece.
In this way the water from the filter can go straight back into the pond - obviously the outlet from the filter must be slightly above the water surface in the pond. This mechanism will normally require a slightly larger pump or better still install a separate small pump to run the biofilter on its own circuit as discussed earlier.
A common problem with box type filters is that they are hard to hide. The alternative if this is a concern is to buy a pressurised pond filter which can be placed some distance from the pond or partially buried.
You can navigate to various pressure filters by clicking any of the links below.
| UV + Bio Pond Filter Selection Table ... By clicking the link below you can review a wide range of biofilters both with and without UV sterilizers. | ||
Fish-Mate Includes UV Sterilizer (see below ... if you're looking for a low cost well tested UV + filter combo for a small to medium fish pond this would be my recommendation) |
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| UV + Biofilter for ponds to 1,000 gallons | UV + Biofilter for ponds to 2,000 gallons | UV + Biofilter for ponds to 3,000 gallons |
| Combo UV + Biofilter for ponds to 4,000 gallons | UV + Biofilter for ponds to 5,000 gallons | UV + Biofilter for ponds to 6,000 gallons |
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