Hi Tom,

This is exact what bothered me about RR. Yes it will tell you about the N:P ratio whithin a average (!) plant and related to that, the assumed uptake ratio. But it does not conclude anything to me about the origin/cause of algae growth (supported by your last reply). So I keep it in mind, but my fight with algae growth does not lie there.

So I will try the work and will fall and get up some times more in time to come, but hopefully get the picture and balance my tank. Do you guys have good documentation/photo's about plants indicating specific nutrients shortages? I'm gathering those (and the plants) for my new tank, hopefully getting the picture sooner....

I've forwarded the forum address about EI to a well respected dutch hobbyist with 40 years of dedicated experience, keeping beautifull dutch style tanks for many many years with rare and new plants in it. He was indeed curious about the method so I got him interested as well...

For now, building and finishing my new big tank lies ahead. I will keep you posted about my progress in EI in Holland after I received the last goodies from Greg's shop, starting in my test tank of 100 liters.

So many thanks for replying,


Koen.