I read the article you sent the link for and a couple of others i found. Appreciate it. Sounds pretty good overall.
I used to have Anachris long, long ago when I first started with my tanks. Maybe I wasn't taking care of it properly, I don't know, but after a few months, it just looked slimy. Gave up on them. I can see why they have to clear it out of the canals. Must be a pain.
Looked Water Sprite up tonight on an online aquarium supply ordering site. they had it and two others that I have been looking for. Placing the order tomorrow.
Thanks.