Roebic K-37-Q-C1500-4 Septic Tank Treatment: 32 oz, 16 oz Concentrate, Safe for All Plumbing Systems, Colorless Formula

Use twice a year on specific recommendation of septic guy. Seems to work well.

I’m not sure how well this works because we can’t “see” it working, and right after I used it, we replaced the drain field, which turned out to be the original problem with it backing up. I don’t necessarily remember the smell, so I guess it wasn’t too awful. I DO know that the simplicity of pouring a bottle of stuff into the toilet periodically in order to create peace of mind is priceless!

For years, we used Scott toilet tissue for economy's sake, but in March 2013 we upgraded to Charmin. A few weeks after we that, our drain slowed. We just figured it was time for a pumping since it had been a while.The pumping worked for a few months, then the drains slowed again. We tried everything -- bleach (I know, very bad, but we were desperate); baking soda with vinegar and/or citric acid; Sodium Hydroxide; Drano; Liquid Plumr; various enzymatic products including Roebic's Main Line Cleaner, S.G.P, regular Septic Tank, Emergency Care; gypsum over the drain field (we have rock-hard clay soil in our area); and cutting water use.Nothing worked until I found the Roebic Leach and Drain Field Opener Concentrate.After 3 clogs in one year and going through ever possible theory -- hair (pet and human), lyme scale, roots, saturated leach field, we realized it was the Charmin toilet paper. (A brief internet search confirmed this is a frequent issue.) So we switched to Angel Soft last month.This time around, at the first sign of slowness in the drain, I immediately came to Amazon to order more Drain Field Opener. I saw this item and thought I would give it a try because it was about $4 dollars less and also treats 1500 gallons.Yesterday afternoon, our toilet wouldn't even flush and the shower flooded after running water for a minute. We put the entire bottle of this concentrated product down the drain in the late afternoon and by bedtime the toilet flushed like a dream.Roebic is the best and only septic maintenance brand that has worked consistently for us and our 24-year old septic system. I always keep a bottle or two on standby now for future emergencies.

Used many products over the years, and finally decided to go the Roebic route. Does it work? Hard to tell, but not having any issues with the tank or field. Use the Roebic line once every three months and supplement with cabin obsession in between.

Been using every 6 months for years!

The only brand that I buy for my septic because it works and I notice the different. Takes away smell and odor quickly. Flushes with it 3 or 4 times a year in my 2 houses and and never had a clog or backup.

We purchased a home with an older septic system and previous renters that didn't really care. It passed inspection, but it was recommended to alternate between Soap Destroyer & Septic Tank every 6 months for a while. I assume it's working - or at least maintaining - since we're not having any issues after a couple rounds with each so far.

Easy to use but I haven’t noticed a difference using one bottle.