Hydrofarm 5 gal ebb and grow help

I have a hydrofarm ebb and grow 5 gal system. The roots keep clogging the drain lines in early flower, I even trimmed the roots twice in veg. Any suggestions to solve this problem? It's really a pain, has killed a few plants already.
I am thinking fabric pots in the unit or possible paint strainer bags. Was wondering if anyone had any experience with one of these units
Thanks for any help

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