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[APD] Rift Lake Algae

Thanks Tom and Paul for your responses.

Tom, I remember reading a post a while ago when you mentioned the mulm addition technique. Thank you for the reminder. I would have forgotton. All of my operating tanks contain Black Brush Algae, Audinella(pardon my spelling). My SAE keep it under control where they can reach it, but it is still growing on the power heads, intake tube interiors, etc. If I remove mulm from these tanks won't I also transfer the BBA? I don't want to do that unless the Africans will eat it. The 75 gallon tank is at my work and not home so it won't get contaminated via any of my home equipment.

When I mentioned the tank had a 20 gallon sump bio filter I didn't mention that I needed to build it. I have the 20 Long, 700 GPH pump, and overflow system in the tank. I'm not settled on the design yet. The filter will need to contain my heater as well. I have access to our machine shop at work, milling machine, lathe, saws, etc.

I just bought about 80 lbs. of what is called "Lace Rock" in my LFS. It was $2.50/lb at one store and $2.70/lb at another. I also bought 50 lbs of gravel labeled for an African tank. It is made in Florida and contains some visable small shells. It isn't crushed coral. It is dark brown in color.I stopped at a local garden center and bought some landscaping mudstone or siltstone slabs to use on the bottom. One slab is about 15" Dia. and 1/2" to 2"thick. $2.00! Probably weighs 7 lbs. at least. What a price differance!

I'm going to place a 3/8" thick pad of spunbonded polypropylene(used under waterlily pond liners) on the bottom of the tank with a 1/8" thick sheet of gray PVC on top of it to protect the tank bottom from the rocks. I want to try coating the surface with sand by using PVC cement and sprinkleing the sand on it before it hardens. This way if the PVC is exposed it will only look like sand.

I may try planting some plants in pots along the back of the tank and hide the pots with rocks. Would you recomend using orchid clay pots with slots in the sides? This would allow water access to the pot. I would cover the slots with very thin filter cloth material to keep the gravel inside.

Jerry Smith in very cold Northern New Jersey. It was -2F this morning. It is +10F now.

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