Kris... what are you on about over there?! Try again!
On the Plexi... I'm going to hold off for a minute, but I PROMISE you this will be explored further after Christmas. I'm poor, so have to get my shopping done early, lol! As long as the tanks are stable, and the plants not in immediate danger of death, I'll be there when I get there - and MAYBE someone will give me PRESENTS and spare me the cost. I'll figure the thickness out - but thanks for the heads-up on the thin stuff, anyway.
Water Lettuce. . . hmmm. . . *grabs a random aquatic plant encyclopedia off shelf*
According to Peter Hiscock (worst.name.EVER, great book though!) in 2003
"This common floating species is available both as an aquarium and a pond plant. In the aquarium, the leaves are 1.2 - 1.6 in (3-4cm) long, but in an open environment they may reach up to 6 in (15cm). . ."
in another area of the book, he writes about the differences found in natural forms of plants as opposed to those grown in tanks and specifically mentions Water Lettuce, saying:
"Water Lettuce . . . will grow to significantly different sizes depending on its environment. In the aquarium the leaves will grow up to 2 in (5cm) whereas in an open stretch of water, they will grow more than three times bigger"
I've read this same information in several other books that I own, as well as in various places online. Yet the mythological "dwarf" rumor persists. I assumed that it was really all one plant, though I suppose it is very possible that there is some hybrid form or something out there *shrugs* Whatever it is, it's PRETTY, the roots are feathery and gorgeous, the fish love it - and the leaves are small enough not to be troublesome. Hopefully it continues to thrive. I've seen repeatedly that it needs a fair amount of ventilation at the water surface, and I really doubt I have that under the hood. Time will tell!