NON-SATELLITE SUMMER PROJECTS (BAIT TANK)
I do a lot of catfishing here in Nebraska. Flathead catfish is my specialty. I use 5"-6" live bullheads and hand-sized bluegills for bait as Flathead Catfish are predatory fish and only eat live prey, which is contrary to the popular myth that catfish are bottom feeders, they are not. However, the Channel Catfish and the Blue Catfish are more opportunistic feeders and will eat stuff like chicken guts and smelly, dead shad sides!
Anyway, I fish for Flathead Catfish. They have almost pure white meat and can be mistaken for Walleye or Northern if they are prepared and cooked properly.
To keep an ample supply of bait, I bought a 1,000 gallon poly tank (~10 feet x ~6 feet x 30 inches). This is a lot of water and, since a bait tank always gets dirty eventually, I wanted to set up a filtration system to clean the water, instead of replacing it.
I came up with this design - three 55 gallon, plastic food-grade barrels hooked in series.
The 1,000 gallon bait tank gravity feeds into the bottom of the first 55 gallon barrel. In that barrel, the water swirls upward to the overflow to the next tank in the series. At the top of this first tank, I placed rolls of porous furnace / air filter media (like scotch-brite pads, but not as rough). This filter media attracts and grows algae that consume ammonia. When fish breath, they give off mostly ammonia (whereas humans give off CO2). The water flows out of tank #1 and into the bottom of tank #2, mostly ammonia-free.
In tank #2, I placed a perforated platform about 6"-8" off the bottom. The water percolates up through this platform (made of 1/2" poly). On top of the poly, there is a layer of lava rock, then crushed marble, topped with pea gravel and then course zeolite sand. These layers filter the water and purify it.
The outflow from the second tank flows into the bottom of the third tank. The third tank has a perforated platform that the water percolates up through, then is further filtered and clarified by activated charcoal (carbon) and is also aerated.
A submersible pond pump hanging in this third tank pumps the water back to the bait tank.
In the first tank, I also have placed a stock-tank deicer heater to keep the water from freezing and to keep the algae active during winter. This whole system is outdoors, so it must be heated during winter slightly.
There are aerator hoses and tubes in each filter tank. I use soaker hose for gardens for an aerator instead of a stone. These get plugged up eventually, but I have them inserted so that they are easily replaceable. In tank #2, I installed an array of schedule 80, 1/2" PVC with holes drilled in it that I can connect to my high pressure air compressor. This allows me to purge the sediment filter when it gets dirty. I will "boil" the rock/gravel/zeolite with air and tap water to clean it out and let the dirty water go out the overflow.
If you have a Koi pond, I can write out the instructions and material list in detail for you to use. It will keep your pond clear as a bell and your fish happy and healthy!
RADAR