BlackShark11k;4239428; said:A fishing line would be possible but it would still considerably sway with current then.

"Thank for all appreciation and comment!
The whole structure is a reverse T shape plastic grid, use the suction cup hold on the back glass, it provide enough support for me to plant and even put some some rock on it.
I don't like to use fish line as I want even you watch in front of the tank, the floating island still dangle without support"

JakeH;4239727; said:That looks soooo friggin killer! I'm doin it! I'd love to do that & a sand waterfall in my lobby tank... While I'm a firm believer in the value of simple design, I think I would "box" the T-structure to make it hollow (maybe 1/2-inch empty space inside?) & fill it with some plastic floating pellets before anchoring it to the back wall. That way I could load some rock on there & make the effect even more wild. I use the pellets to make floating planter boxes & they are much more stable & flexible than styrofoam IMO...
Myarbro;4239732; said:I'm going to add you as a friend. Let's see if we can trade some ideas or something.
See, what I am confused about is the T-Structure. What is that exactly? Picture? Link?
Thanks!