Bosh Chemical Vanish Pool & Spa Stain Remover 2 Pack (4LBS)- Natural Safe Citrus Based, Works Excellent on Vinyl, Fiberglass, and Metals, Removes Rust and Other Tough Stains

I can scream from the roof tops how Vanish saved my life. We have well water and had a dark brown pool. I wanted to cry and was ready to drive into this pool when I found vanish. I was very on edge when I found vanish but it literally worked in a hour and I had crystal clear water. Keep reading because this is important you need to put both canisters in all away around the pool with the pump off. Leave the pump off for a hour or more. The pool was crystal clear and bright blue. I did not have to vacuum and it removed all stains. This is very fast and easy to use. I will order this over and over again and post every-time I see water with medals. This product doesn’t work if you don’t follow the directions though. You also have to make sure your PH is level first. It’s great quality if you’re ready to drink, cry, and get rid of the pool you HAVE to try this it won’t disappoint.

I wasn't expecting much from this but I did what it said to do and after a couple of days my white fiberglass pool that had tons of orange brown stains was now completely white again. A tip is to turn your pump off and put this in and leave it off for 24 hours. Just go ahead and do it. If you turn your pump back on in an hour or 6 hours or 8 hours or whatever this stuff immediately starts getting sucked into your filtration and pulled out of the pool where it's not going to do its job. If you put a whole bottle of this in your pool half of it's going to be stuck in the filter not doing anything so it's best to just leave the pool off for an entire day and the results are much better much faster. Turning the pump back on too soon renders this product useless since it gets filtered out too quickly. But I didn't look into it enough to realize that after you do this you absolutely must use a sequestering agent such as metal free or whatever the name your local pool place calls it to now get this metal out of the pool once it's lifted. Some of these products tell you that on the label and some don't but you have to or there's no point in even bothering. If you don't do this the metal stays in the water and eventually sticks right back to the pool and stains again. You absolutely have to do this just like you absolutely every pool season must use clarifier and a phosphate remover weekly. It's that important to do this immediately once this stuff works after a couple of days before you start doing anything else including putting chlorine in. Get the metal out first with a metal free sequestering agent before doing anything else or you going to be pulling your hair out a week later when the pool looks worse than it did before. Also, it's not as simple as the directions say to wait a day or two then rebalance. By a day or two later whether you started this with your pH low and your chlorine low doesn't really matter. The absorbic acid in this along with your chlorine will eat each other so all your chlorine is going to come out anyway regardless. Your alkaline and pH will probably go lower as well. That's why it's best to use this when you havent put anything in your pool for a couple of weeks where it's just naturally low on all the chemicals you need so that way it just does what it's supposed to do without you having to do anything special to get your chemicals out of the pool that we're already there. Just let them come down naturally in a couple of weeks then use this stuff. Once you use this all the chlorine will come out of the pool within a couple of days and naturally this will make most people want to start dumping chlorine right back in the pool immediately because everyone is afraid of the water clouding up or algae blooming again. But it's not a good idea because the absorbic acid has to be used up first which it in fact does stay in the water quite a bit longer than the couple of days it takes to whiten your pool or it along with the chlorine you put back in will eat each other immediately causing your pool to hold no chlorine. Then you'll be putting chlorine in every single day only for it to disappear in less than 24 hours. You just absolutely must use this, then a metal free agent, then once a few days goes by slowly start putting chlorine back in. This is a process that most people are going to find to be an extreme headache but it's the only way you can do it properly without having your pool becoming so imbalanced that you spend weeks trying to get it back to what it looked like before you put this stuff in to begin with. This will end up throwing your alkaline and pH off along with by the time you do all this with this product and a sequestering agent to get the metal out will create extra phosphates that will cloud the water. It's seems to be a lengthy process but worth it if you do it right and just deal with having your pool imbalanced for a couple of weeks. Mainly because you have to slowly put chlorine back in because if you put it in too fast it oxidizes the metals that are still in the water and restains. Trust me, if you don't do this properly the stains will come right back in your pool & will look worse than it did before since now it will be a cloudy mess and you will be spending tons of money and time going to a pool store having your water checked several times trying to figure out why it's not holding chlorine and why your pH and alkaline keep going too high than too low all the while having a cloudy pool but gleaming white as long as you didn't throw in too much chlorine too fast. If you do that it reverts to the old look and you're going to have to do all this all over again spending another couple of weeks trying to get everything clear and balanced. My suggestion is unless you can't live without ugly your pool looks early on in the season to instead do this closer to the end of the season when the summer is coming to a close and the luster of the pool has worn off where you don't really care anymore. Everybody knows that feeling that by then you're over it and you're just ready to be done with it. I personally used this right after I opened it and it cleared up because it was too unsightly to let go through the whole pool season. But if I ever did it again I would definitely wait until around September because the amount of time you're going to have to put into getting everything back to normal and clearing the water up and keeping the pool holding chlorine and getting the absorbic acid and metal out of the water almost isn't worth it if you're trying to get your pool cleared up for the holidays during summer. It can be an extreme headache but worth it in the end. You just have to know this going in and none of these products tell you that this is what's going to happen. Just be ready to make several trips to the pool store to have your water samples checked and you're probably going to go through by the time you do this more chlorine getting everything back to normal along with muriatic acid and PH up and alkaline up and taking those back down. It's an extreme headache but again can be worth it if you're patient and know this going in. It's not as simple as putting this in and it turning white and you just dumping chlorine back in and everything's fine. It's too bad it's not that simple but it's just not the case. You have to be careful when doing this or you're going to have a very long summer pulling your hair out trying to get your pool balanced back after using this.

Love this stuff for my vinyl pool. Cleans up green algae stains or what ever stains they are from debris from trees in about 2 days. Nothing else doed the job. We even have a pool guy that never gets it clean unless I throw in this.

Not an effective stain remover- at least not for my gunite pool! After researching and reading multiple online Amazon and Reddit reviews and watching U Tube videos on pool stain removal products, I decided to give this one a try. I ordered the double pack as some reviews had mentioned needing a second application. After lowering the pH and chlorine as instructed, I added the first container to my pool. As some reviews recommended letting it sit for a day or two and some described following the package instructions exactly which meant turning the pump back on one hour after application, I decided to initially try a compromise between the two sets of instruction and turned my pump back on a couple of hours after application. I figured if this was unsuccessful, I could let it sit longer with application of the second container. Since there were no results after running the pump 48 hours after the first application AND scrubbing the pool vigorously with a metal pool brush multiple times over that 48 hours, I proceeded to adding the second container. This time I let it sit in an unfiltered pool for another 48 hours before resuming filtering. Again, no results! To further collaborate this finding, I had used a Culator metal sequestering packet which comes with a nice color chart indicating the type of metal leached from the pool after stain removal and mine was still white! Meaning no metal had been removed! Since I still have metal stains in the pool, I plan to try ascorbic acid next as I’ve read it is more effective than the citric acid in this product. I hope so as this process is getting expensive! I’ll post a review of that product next. In summary, if you have really set on pool stains, this product may not work on your pool despite your best efforts!

Our 25K gallon plaster pool had significant tan colored staining on side walls and corners. Used a double pack (4 pounds total) and followed instructions. Results were underwhelming… until day 4, when I was shocked to find my pool looking amazing. Since there were still some light stains left, I ran a second 4 pound dose a week later, and this time the water went cloudy. Took the better part of 2 weeks for the cloudiness to subside (during which, we added clarifier multiple times and did several filter cleanings, but don't know if that was needed). The pool is now clear, and chlorine is now stable (read other reviews on that topic), but the pool looks like new. My thoughts: Your results may vary based on these reviews. Follow instructions. Results may take days. Water chemistry may be off for a week or two after use, but is fixable. Try it! If you are lucky like me, you may see amazing results for very cheap money, and no physical effort.