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They are so crazy looking :like:

Here are pics of a gfp wild under a blue light.

A shower will dramatically increase humidity in my equipment room I would presume? I’m not sure that’s smart in my situation since the equipment...

Thanks. What if I go with something different like a bead filter? Also, if I were to two S&G gravel filter barrels in parallel, how much flow...

For airlift I would say go with brushes/and settlement vortex chamber then to bio.

The two S&G filters will do some bio , but not enough to be the only bio filtration for a 4,000 gal pond . Two more barrels built as moving bed...

Why would it be harboring any bacteria? It will start becoming a home to the bacteria when you immerse it in water that has a population of...

And then a 3rd for a bio filter correct? Or would that also be a two drum setup to hit 4,000gph

I thought the same thing. I wonder if doubling the physical size and shipping cost from the Netherlands has anything to do with it?

I think a typical barrel SG filter runs 12 or more inches of head pressure. This alone will be too much resistance to get good flow from an airlift.

That was my original plan. They are so porous that I question whether I could completely wash away the bleach before installation...

For lava rock I just spray with hose to remove dust and grit before installation and use.

Would you guys recommend washing them before putting them in the shower? My friend is recommending soaking the feather rocks in bleach or PP to kill...

Thank you. What if I try to do it with a siphon through out and airlift at the end? Like in this sketch where I put the airlift inside the pond and...

Each 55 gal. S&G filter is good for 2,000 GPH , so yes , at one turn over per hour on a 4,000 gallon pond , two S&G filters would be great . They...

The Birdman design is certainly an inexpensive and solid looking filter. I would intend to move the water at least once per hour, that would mean I...

Airlift efficiency starts to diminish greatly over 4-5 inches lift and a high efficiency pump might be more efficient. Lifting the water over the...

It will be worth Your effort to build Your own filters . DIY filters can work better than most store bought filters . We use a lot of the poly 55...

Same thing recently happened to me, several folks posted some recommendations. To access bottom drain for the amount of time you need might require...