I finished taping off my tank with "FROGTAPE" "delicate surface" painters tape last night. The tape package claims "60-Day Clean Removal/Low Adhesion". You can even accidentally stick it to itself and still peel it apart easily. The glass is half an inch thick and I tried to position the tape about half an inch from the join on each side. The original bead was perhaps 1/2" inch wide. So I felt I had built it enough overkill. I had my wife as a spotter to help me position the tape. Its hard to stand on a step ladder and bend into the tank to lay down the tape. You can't bend over far enough to see the distance for the horizontal gap on the bottom of the sides while holding your arms apart to lay the tape.
I used 4 large 10.3 oz tubes of Aqueon Aquarium Sealant to lay the bead. I smoothed it with a 45 degree bend of 1.5" ID PVC fitting. I should have taken a picture but I was in such a hurry to pull off the tape before it set that I forgot to do it.
I have to say, this Aqueon brand off gasses far less acetic acid than the Marineland brand. When I did this for my 55 gallon the fumes were so fierce it was hard to reach into the tank and remove the tape. I was afraid my 200 gallon tank would be like a killing jar. But, this Aqueon brand barely made fumes and my negative pressure setup for removing fumes is almost overkill. I hope the relative lack of fumes is not a bad sign. Its a huge pain to tape off a tank this size while standing on a ladder or desk beside it. The desk top, being level with the bottom of the tank, was better for standing on than the top of the step stool ladder which topped out about 6" below the bottom of the tank.
Its messy and drippy trying to pull off 6 foot lengths of tape covered with silicone sealant. I gave into temptation and tried to smooth a few places that did not seem good and just goo'ed it up. DOH!
Update: I called Aqueon
directly and their tech support said that as long as the silicone was still fluid when it comes out of the tube; it would cure to full strength. This morning it was pretty stiff but you can tell its still not quite cured. Will probably wait till Saturday evening or Sunday afternoon to fill with water.
X6 1100T BE | Gigabyte GA-990FXA-UD3 AM3+ | XFX HD 7870 | 16 GB DDR3 | Samsung 830/850 Pro SSD's | Logitech cherry MX-brown G710+ | Logitech G303 Daedalus Apex mouse | SeaSonic SS-660XP 80+ Pt | BenQ 24' 1900x1200 IPS | APC Back-UPS NS-1350 | WinXP64 Pro