Chad, not saying you're doing anything wrong, but the whole attaching frags to rocks thing should be way simpler!

Tunze Glue
 

Its the best. U only need a small amount. No Cloudyness. Easily mixes in your hand no microwave needed. Just grab eqaul parts of each color mash em in your hand untill u feal it getting warm then BAM ! whatever your gluin is glued

http://www.jlaquatics.com/phpstore/s..._ID=tz-z010474

When i ran my 14G biocube, I used both Aquascape and holdfast with no problems. slight cloudiness that cleared up in minutes.

could be a bad batch of the milliputt brand out there....

im going to use zap straps and crazy glue gel..... That putty stuff was so risky i it almost bombed my whole tank.. Im not kidding when i say there wasnt any movement in my fish they were all huddled in a corner laying on the tank floor breathing heavy while detris blew on top of them.

So sad....

I had the same experience when I used the same product that Aquattro is refering to.