Planted Tank Obsessed
Join Date: Apr 2010
Location: Spokane Valley, WA
it would be interesting to know your kh/gh and ph. i know your using ro/di water, however it may just be dissolving constituents in the water column. Personally, I would first get an iron test (I like seachem's but to each their own) and start with a basic knowledge of where my parameters are at. I would then try and lower dosages while keeping a nominal amount of Fe in my aquarium. Just how I would go about things. Hopefully someone will come up with a miracle answer for you.
"The odds of winning are the same as being mauled by a polar bear and a regular bear in the same day"