Backyard Aquaponics
A place to discuss aquaponics

this is also true, but i still recon the bucket gravel lends itself to being less problem prone regarding glogs.............


how funny is this, we're each arueing FOR the OTHERS idea

LOL, something not right about that!

I could turn LOL

On a similar note what about corrugated iron. It is relatively easy to get hold of in resaonable quantities and if it is going to be painted with bitumen paint then small holes could be patched and rust covered.

How would you make a tank out of it though?

You need a bending machine really: They are three profiled rollers, just like a pipe bender. I think they are usually hydraulic. You wind the iron through a number of times, each time it adds a little more bend. Not sure how you would crimp the bottom on though.

Over here GAF and some other manufacturers are offering a self healing membrane that is used on roofs. I don't know if you had thought about it or not. I used it on part of the roof of my house when I built it in 1999. It came in a roll like tar paper, but has a sticky back on it which is covered by a film until you are ready to apply it. The stuff used under composition shingles, like I put on my house, has a bit of aggregate to it and says it is not rated for direct exposure, but some of it is (I think). The product I used was GAF Weather Watch, you might be able to find it on the net.
Kevin

On the idea of bending sheet metal, why not use a sheet metal brake? Over here we use rolls of aluminum to trim our houses. (The coils/rolls are 50 feet long and two feet wide.) You cut the aluminum to the width and length that you need, then you place it into the brake. The brake is basically three or four flat steel/aluminum beds which has a hinge point between the beds. Two of the beds clamp down onto the sheet metal, and then you bend the metal to the desired angle by using the hinge action. Most heating and cooling places have them to make tin ductwork, but the ones the siding people use are lighter weight and six or more feet long.
Kevin