Whisperer, I think it's a tortuosa too, and have had other people suggest so as well. I asked the person I got it off if he knows what it is, but I haven't heard back yet.
ddnguyen, I used to use the full Zeovit system, but I found it took too much daily dosing and I found I had a lot of troubles with algae. I couldn't achieve the ULNS with Zeovit. I quit using the system in April, but I do use Coral Snow 1x weekly and Spur2 1x monthly.
jnc914, this Acro doesn't look like any Crayola Plana that I have seen. Crayola Planas tend to be quite fuzzy where this Acro of mine has fairly minimal PE.