Good stuff on the last page. Im glad Vin decided that he wasnt too good for forums after all.
What are you talking about? I **AM** too good for forums. ;-)
That's one of the main reasons I prefer A. nana 'Petite' for back walls. Buces earn more money though.
Vin, do you have a way to separate out how much the plants may be taking from the water column? I'd be really curious to see what the results would be like if that could be sussed out. Also, have you considered removing a bunch of mulm and having that tested as well? I'd be quite surprised if the organic material in the substrate isn't a nutrient sink of sorts too. Even with fairly enriched soil, an inch cap of 2-3mm quartz sand created an effective barrier to nutrient leaching in my thesis study too. I'm looking forward to seeing your results!
Hey Phil, I'm starting to get an idea on NO3 uptake in my tank. It's not as high as I thought. I was expecting about 3 ppm per day, but it's looking like closer to 1 ppm per day. If that. Obviously, less for P and K. Don't have a way to gauge Fe and trace usage yet.
CO2 is very high. Light is moderate to high. I haven't measured in a while, but probably 100-150 or so at substrate.
But before I dig my heels in, I need to test it a few more times.
No, I am far from testing mulm. Want to get a handle on what's being sucked out of the water when everything is non-limiting.
If you've been following my Osmocote tank...after 8 months of set up and amazing plant growth, and no water column dosing at all, ICP was unable to detect ANY nitrate in the water. Yet, the tank has the best and most effortless plant growth I've ever seen. I was assuming there was some leaching into the water. And there may have been more of that earlier. But 8 months after set up, there is no NO3 in the water.
PS: wish you were coming to AGA.