Copper Sulfate Pentahydrate - 25.2% Cu - 5 Pounds - Easy to Dissolve - Powder

Really like this stuff and seems to be working well. My main sewer line has a bad root problem, all 90' of it and would backup on a regular basis every three months. Since I have started using this, I haven't had to call for sewer service in 18 months. I know I will have to someday because I am certain it is not reaching the end of line where it turns into the city line (90ft away) where I have a really bad root problem next to a maple tree. I try and get 3 applications out of this 5 pound bag but I also mix it with other additives like foaming root killer (believe its a salt additive) and another foaming additive I get at menards cheap to make sure it climbs up onto the roots. Don't use this by itself, it won't reach roots, you absolutely need foaming additives. This concoction seems to be working really well for me. I have 4" pipe leading out of house into 6" clay for 80 ft or so back into a 4" at the street.

Worked as it's supposed to

It is the cheapest algaecide. I used 1 tablespoon for each 1000 gallons, and it has kept my pool free of algae for 3 months. This bag will last a long time.

Directions: use 1 tablespoon per 1000 gallons of water once every 14 days its that easy only issue it will turn your filter blue if you dont disolve it right so some warm water and your good

I know that this is not listed for Swimming Pool. I am writing this review because no other post were Saying you can use this in a Swimming Pool. It is the Same Active Chemical used in those little Yellow out and Green out Packages that you buy to Clear algae but less than half the cost and you get a lot more active ingredient.I did not plan on swimming in the Pool I brought back to Service for a while and until the PH Settles in at a Safe Level to Swim, So if you have a Severe Algae Problem such as I had, I highly recommend buying this and Sprinkling it around the Pool with Algae problems. Follow up with a couple of Pool Shock Chlorine Bags. The Day after you do that, you will See a Huge difference, and then as the Algae Dies and gets caught in your Pool Filter, Just Keep Cleaning the pump filter and you will be Good to Go and Swim in approx 1 Week. 1 A Week is a conservative estimate and it is based on me checking the PH Balance of my inground Pool each day until all algae were gone and the Chemicals were perfect level to Swim again!I hope this review helps other Swimming Pool Owners!

Happy with this purchase.PS- to all my amazon fellow members, please be extra careful when returning items nowadays, they are finding all kinds of ways and tricks to refuse refunds.

I’m using this in my pool instead of spending large amounts of money on pristine blue product. after using it for a while I’ve come to a perfect mixture of 2 cups of the dry mix to 64 ounces of distilled water this seems to be the ratio of what pristine blue product is. Or at least it raises it the same exact amount of ppm

I bought this to grow crystals on various objects and it performed beautifully! I made a mistake though. Once I got the seed crystals I needed the remaining solution was left to sit on a plate in my work area. I got busy...Some Time Later - I needed that spot for another project and discovered that the solution kept pumping out tiny little crystals which have migrated over the edge of the plate and onto other things. I am cleaning that up with protective gear on and a friend stops by because they haven't seen me in awhile to find me wheezing through a facemask while shuffling blue crystals around my shop.Good product.