Re: Humic acid

>I paid a visit to my local hydrponics outlet on the weekend to
>obtain supplies for PMDDs. I came across liquid and powder
>form humic acid. This has been mentioned in some of the 
>technical discussions about plants and absorption of
>nutrients. Is this of any use in a planted aquarium?

I dunno if it is of value (I think so) but you don't have to buy it. 
Just cut water changes and don't vacuum your gravel.  That is the
major accumlant in my tank.  After several months, I can do a 99%
water change over a week and still have very low pH.  That is from
all the humic acid bound to the mulm.   Dave

Dave Gomberg, Experimenta      San Francisco CA USA   gomberg at wcf_com