While waiting for the tank, I decided to start building the rock frames. I've been really impressed with some of the pillar based aquascaping I've seen online. My personal favorite, if you have the time, is on
www.reefvideos.com. Go to the first video, which is a tour of Carl's 150 gallon. Wow. These designs were built using frames upon which live rock, which was drilled so that a rod can slip through it, rests.
I think I'm going with this design, so I bought the parts to build what I thought would be a great frame. Unfortunately, I've run into a problem that has the potential to trash the design. See if you can pick it out before I get to the end. First the pics:
Here are the parts for the frame:
When cut, the pieces should go together like this:
The pillars are made out of driveway reflector rods from Home Depot. They are called "Hillman Sign Center" UPC #4589931865. They are about 4' long and 3/8" in diameter. They are made out of fiberglass, I believe.
The following fitting was NIBCO #4703 size 1/2". It is used to transition from the 1/2" CPVC to the threaded side of the John Guest fitting. There's a rubber gasket inside which I easily pulled out and discarded:
Screwing into that is the 1/2" threaded end of the John Guest 3/8" fitting (Quick Connect Male Adapter 3/8" OD x 1/2MIP #PL-3027):
The pieces fit together GREAT and the fiberglass rods, after I cut the reflectors off, fit in very snug into the John Guest fittings and they don't come out unless you depress them. It couldn't work better.
This is how they fit together:
It looks like this right before the rods go in:
This is the finished frame:
To make 4 more, here are all the parts:
I didn't list them, but I also needed 3 "T"s (CPVC 1/2" #CP4711) and 4 elbows (CPVC 90 Elbow 1/2" #CP4707) per frame along with 4 feet of 1/2" CPVC (#12005) and one reflector rod with the reflector chopped off. All of this was from Home Depot.
Did you find the problem?
Everything fit perfectly and it was really easy to put together. Having the rods lock into the John Guest fittings was really nice and it was the only way I could think of getting them to fit in really securely. Only after I finished did it cross my mind, however, that there's a small amount of metal inside the John Guest fittings. These are identical, albeit a bit bigger, to the ones used commonly on 1/4" Reverse Osmosis fittings. Do you guys think that small amount of metal is enough to cause problems? I suppose I could put some silicone sealant around it, but it's pretty tight as-is. I don't know how much metal is inside, but it looks just like a really tiny amount. The color of the metal is silver and I don't know what it is made of.
In a 360 gallon reef is this something not to worry about or should I ditch the design? If I do that, I'll instead use the 1/2" CPVC for the rod portion of the rock frame and thereby avoid the John Guest fittings, the fiberglass rods, and the CPVC adapters entirely. The downside to that is I'll have to then drill much bigger holes in the rocks and the rods wont be as firm either.
Thanks in advance for the advice.
Los