I would love to have comments on the BioKleen Bac-Out Drain Care which uses only natural ingredients which are is enzymes AND NATURAL LIVE CULTURES; which is supposed to be more effective than just the enzyme type of drain cleaner.

I've looked into InVade Bio-Drain which uses citrus based oils; also American Bio-systems Drain-Gel which uses concentrated bacterial gel which is suppose to contain more than 550 billion cells per gallon.

I'm trying to get rid of the fruit flies/worms which have appeared in one of my tenant's shower drain...