I'm shopping for activated carbon to remove tannins from my pond. The best price I found was about $2.50/lb including shipping on ebay. Anyone know who might sell it cheaper?
I don't want to invest in it unless you members recommend it for clarifying the water.
How much do I need to treat a 5,000/gal pond? How often will I need to change it out during the season?
How long will it take to remove the tannins? I plan to do a partial water change while I do the major cleanout this spring and then treat with the carbon. I can't do a total water change because I don't have a holding tank large enough for all my Shubunkins.
I've never used it before. Do you have a bio filter and UV light on your pond? Usually, once the water gets healthy ( I add extra pond bacteria and enzymes) it can balance and stay that way. I do occassional partial water changes after I clean the filter media ( I just let some of the water run out and purge the sponges with pond water) and scoop the leaves off the bottom, and refill what I lost. I have a heavy leaf drop, but so far no tannin problem if I stay on top of it. A skimmer works really well too, so the leaves don't make it to the bottom to decompose.
Thanks for the info, Mary. I do have all the equipment such as adequate pump, bio filter, uv, but the heavy leaf drop has caused discoloration. Otherwise, the pond is healthy. I also have the bacteria and enzymes to add to the pond during spring cleaning.
A better net next fall will help, but for right now, I'm trying to fix the tannins.
Yes, he should use the activated charcoal and he should put it at the top of the waterfall spillway where the water can flow through it. Or he can use it in the skimmer, depending upon what type pond he's got. Charcoal has a finite capacity to take up impurities, so it may have to be replaced before the water is once again crystal.