I did a quick check and apparently Lotus are Monocotes so they still fall into good "companion" plant category for Aldro.
I did have a Lotus plant on my small plastic pond before I got aldro from my good friends in Penang, which came from Richard. But after I started putting in the Aldro, I also added some Horsetails and cattails (small ones) which are monocotes as well. Anyway yeah Lotus are okay as long as they do not over crowd the pond and their leaves cover the water surface, and take out the sun that Aldros might need.
Yeah I agree that Algae is the biggest enemy, luckily never had algae on my pond probably because of the monocotes as well as snails. I even chose not to put any fish after the last one died.
Oh, you know what else is pest on my Aldro? U. Biblis! Sheesh they overgrow too quickly, so this is a warning, do not include U biblis with your aldro
TTFN
Arvin