Quote:
Originally Posted by guruofgardens
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It looks like it is labeled 100% DE, so it should be OK. the different brands have different average size particles, but they perform similarly.
If you are using standard inserts or pots in a 1020 tray, you will find that the precut drainage holes in the bottom are much too big to hold back the DE. I turned my 72 cell inserts upside down and put masking tape over all of the drain holes. i turned the insert right side up, put it on a couple of layers of cardboard, and used a home made tool- 1/2 PVC tubing with 3 or 4 small finishing nails duct taped to it, to make new, smaller holes. If you use the original holes, you'll have a lot of DE wash out, especially if you lift the insert to bottom water.
Jim