06-03-2009, 06:44 AM
Join Date: Mar 2008
Location: Liberty, TX, USA
iTrader Positive Rating: 100%
| | Re: Method of controlled imbalances and gda...
Christian, what I'm seeing as Potassium defficiency (and I may be wrong, I just don't know what else it would be) is small soft spots developing in the lower leaves of my stem plants and throughout my epiphytes that do not have roots in the substrate (anubias and java fern). These spots gradually get bigger (almost like a fungal attack, but with a circular pattern rather than irregular shapes).
When it appeared on my epiphytes I thought first it might be micro defficiency since I have not dosed any micros in a couple months (my soil underlayer started releasing nutrients and every time I dosed micros I got very bad Green Water and GDA outbreaks). Really, I think I need to remove all my substrate and start over without the soil.
Roy (and Christian), maybe I misunderstood. I dosed KNO3 until I got Green DUST Algae appearing on the glass rather than Green Spot Algae. Coincidentally, I did get 1 or 2 new spots of GSA about the same time. Should I re-do?