LEISURE TIME45310-04 Spa Replenish Shock Oxidizer for Spas and Hot Tubs, 2-Pounds, 4-Pack

This product is available at most hot tub and small pool dealers. It is recommended for most hot tubs and works very well as a supplemental chem sterilizer at half the price of most pool dealers.

I have used leisure time chemicals for many years to keep my hot tub clean & clear. Replenish I believe replaced the name Renew, but it seems to do the same great job. Will purchase more when needed.

Very good product and really does its job!

Works well and surfacing oils and guck from the tub. A brown oily residue comes up to the top of the water and suds up which tells me it works well. But using this alone doesn't keep the water clear. But using this product in combination with a little chlorine does keep the water very clear.

Have used this product for years. It is easy to use, and very reliable. Highly recommend.

Lasts super long in hot tub and keeps perfectly balanced. Total and free stay identical numbers like they should all in one step

I only use Leisure time products for my spa. I've tried the store brands and the ones that my local pool and spa store sells. Leisure Time chemicals are FAR superior to all of them! The results speak for themselves. Once you use Leisure Time, you won't want to use anything else. The difference is clearly noticeable. You'll love your spa more each day!

We were desperate to get this product for our hot tub because we were almost out. The dealer where we bought the tub was completely out & wouldn’t be getting a shipment for several weeks. We found it on Amazon for an even better price & received it even quicker than promised.

No problems with this brand. Works excellent in my hot tub.

Had such huge issues with the hot tub since we moved in. Had it professionally cleaned and chemical maintenance done, but no matter what we did it the water wouldn’t stay clear.Bought this product and haven’t a single issue since!!

Four functions in one. It really softens the water and I'm not playing Chemistry.

Works Good new price is a little steeper.

After using this product according to instructions, we noticed the water was never clear and more recently, there was sludge in our tub that we never had before. We had a sample tested where we purchased the tub and we were surprised to learn, our PH was 4x higher than normal and too dangerous to bathe in. We had to empty half the water and fresh water to remedy this issue. The depot asked what we have been using and they mentioned this product is not meant for bromine spas and to stop using immediately.