Customer Reviews for Instant Power 1 lb. Toilet Tank Cleaner

Worked just as excellent as the reviews and pics said and showed. Our tanks were so black inside with years of well water buildup you couldn’t see the bottom. After about 2 1/2 hrs of using half the bottle I could already see the difference removing about half the buildup. Left it in overnight and the next morning it had removed almost everything. After 24 hrs in the tank the tank looked practically brand new with only the one application. The second tank I used the other half of the bottle with equally impressive results over the same amount of time. No scrubbing required. I put paper towels around the waterline as it sat overnight to get the buildup just above the water. Also soaked paper towels with the tank solution and placed around the bowl to get those stains overnight as well.

Works well when left overnight in the tank. Use as directed on the label.

Second time this happened I will be returning this late is broken again

Amazing product easy to use, fabulous results.

Has no effect on anything biological. As long as you know what you are dealing with, this is a good product.

It's amazing. Have it about a month. Thankyou! When I need some more again I will be ordering. ?

Item cleaned but expected more when it came to removing orange buildup removal.

I have a 1976 big toilet Tank that was lagoon pitch black. I put 1/2 bottle in overnight & put other half in the next night It looked SPANKING NEW.

I bought this along with a complete tank repair kit so that I could clean up the old gunk inside the tank. I used half the bottle, per the instructions, and left it in the tank overnight. This morning, I opened the tank to see that all that was left up to water level was the smudged rubber markings from the prior rubber tank bolts at the bottom of the tank. 10/10 would buy this again!!

It got off perhaps 85% of the caked on goo. Not bad for an old toilet.

This product is the best! Just pour in the back of the tank let it stand and it cleans by itself. All the mineral deposits were dissolved.

Safe to use in toilet tank. I used half of the powder and now the tank is cleaner. I will purchase again

A brown coating inside your toilet tank may not be rust or minerals at all. It may be a brown algae (if on well water). You can rub this off easily from inside the tank with your finger or a small brush. It is more likely to occur in toilets that are not flushed frequently in your home. This product will not work on algae, as I discovered. I am not saying it is bad, just not the right product for my problem.

Let it stay in the toliet tank for 12 hours. Excellent job at cleaning the tank.

This product is amazing but I used to be able to pick it up at the store. This time I had to order it and have it delivered. It cleans the tank good without damaging the inner components.