Is this just copper sulfate which can be bought pure for much less?

I think Robert has a good idea there.But, I checked on ebay and the Copper Sulfate Pentahydrate 99% was $10/pound, the same price as this product (now $20 for 2 pounds). So it works out the same cost wise.

compare to Roebic FRK-6 Foaming Root Killer, Which one is better? Thanks

I really don't know the answer. I've used the other Roebic root killer because we have a long standing problem with roots from a large tree fouling up our plumbing and causing back-ups in the sewage line to the street. I've used it for years and didn't even know about the FRK-6. My off-handed guess would be that the FRK-6 would be great to blast through a tangle of roots with and the K-77 I use is more of a preventive measure. I started using that after I'd spent $$$ having a "roto-rooter" guy ream out the sewer line for the umteenth time. I probably wouldn't hesitate to use the FRK-6 if I had another blockage in my line. I use the K-77 every six months and haven't had to resort to calling a plumber for several years since I started using it.

Has anyone had experience using this product on a slow moving drain WITHOUT having their drain augered?

I use that stuff every 3 months 1/3 of a bottle, now I augered my drain because mine had really backed up but I won't stop using this stuff, I haven't had to do anything else with the drain so I imagine it is killing all the roots from growing any further. It's definitely worth a try, I've got a friend within the family that does plumbing and he told me that is about the best on the market!

Is this safe to use in a Septic System without harming the septic mound which is about 200 feet from house?

I have used it twice in the past year and to my knowledge there has been no damage to my septic system. The product worked very well.

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🌿 Keep your pipes root-free and flowing—because clogged drains are so last season!

SAVE TIME MONEY - Avoid expensive digging and rooter services with proactive root control.
ROOT STOPPER POWER - Kills invasive roots at the source to prevent costly clogs and backups.
MAINTENANCE MADE EASY - Simple application every 6-12 months keeps your pipes flowing smoothly year-round.
PIPE FRIENDLY FORMULA - Non-corrosive and safe for all plumbing and septic systems (except FL septic).
ECO CONSCIOUS PROTECTION - Won't harm trees, ground cover, or beneficial septic bacteria—smart care for your environment.

Roebic Laboratories K-77 Root Killer is a 32oz copper-based treatment designed to clear and prevent root intrusion in sewer and septic pipes. Its non-corrosive formula safely kills roots at pipe entry points without harming plumbing or the environment, providing lasting protection with applications every 6 to 12 months. Ideal for proactive maintenance, it saves costly repairs and keeps drainage systems running smoothly.

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Manufacturer	Roebic Laboratories, Inc.
Part number	K-77-2LB
Item Weight	4.54 g
Product Dimensions	11.43 x 19.05 x 5.72 cm; 4.54 g
Item model number	K-77-2LB
Size	946.35 ml (Pack of 1)
Item Package Quantity	1
Number of handles	1
Coverage	Broad-spectrum coverage (weeds and moss)
Special Features	Clears Clogs, Keeps System Running Smoothly
Batteries included?	No
Batteries Required?	No

Roebic Laboratories K-77 Root Killer, 32OZ

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