Hi, swylie. Hope you day is going better than mine. Slept terrible last night. Then somebody wrapped his car around a tree this morning (icy roads here) causing me to be 1/2 hour late.
Have you thought about just using the off-the-shelf filters?
If you mean the 'whole house' filters found at Lowes, Menards, Home Depot, etc., then, yes. That is what I was thinking of.
Or were you planning to use these for strictly chemical/biological filtration?
...I will also have one (or possibly two seperate)for bio and mechanical filtration.
Where the heck was the heat shrink going to come into play?
If you look at a filter cartridge made of paper-like material, you will see that the paper is wound on a tube made of plastic mesh. I was going to remove the paper and cover the tube with the heatshrink escept for the bottom inch or so. This would force the water to flow all the way down through the media (which I would stuff into the filter). This would also give more room for adding my own media.
I did find an old post on another forum that mentioned that a 1/2 inch pvc pipe will fit into the center of a filter canister, so just drill some holes in the bottom end and there you are. Don't know if 1/2 inch will work with the ones at Menards, but some other size probably would.