API pH Down 1.25oz

Happy overall with the product. It is just the solution itself so you need to get something separate to measure any changes in pH. I got a pH testing kit from the same company and it's a bit confusing to use but that's it's own separate thing. It does do the job, but using it on a 5 gallon tank I had to dose it several times before it got down to the right level. Slightly confusing process for anyone unfamiliar to it but overall it worked well and the fish seems better off now so I'd say it was worth it.

Its a good product, works like it should. Occasionally I would have to add a little more than I thought, but over all it does the trick. API in general has great aquatic supplies.

Great product for PH balancing. Tank has stayed consistent PH for weeks now. Betta is loving it!

Very effective. Acts quickly. My bettas improved in health.

Started with pH of 8.5. Inserted the amount recommended on their calculation page. 12 hours later, pH is still at 8.5.