Dr. Tim’s Aquatics Saltwater RE-Fresh for Natural Fresh Sparkling Water – For Fish Tanks, Aquariums – Reduces Organics, Preserves Clean Waters, Odor Free – Eco-Friendly, 100% Natural – 8 Oz.

I bought Dr Tim's Aquatics RE-FRESH 8 oz and Eco-Balance 16 oz bottle for Saltwater from Amazon. None of them has Expiration date on bottle. I have 75 gallon tank. I put 20 ml of RE-FRESH in. The liquid is black with back residue on cap . Day 1: the fish are no longer active. Day 2: fish developed tiny bubbles on skin, the purple Grandma swim fast rubbing the skin on rock to scratch it. The protein skimmer is brown and smell rotten. By the end of day 2 the purple Grandma die. I changed 15 gallons of new salt water. and put in 20 ml of Bio-Balance with the hope to rescue other fish. Day 3: Cardinal die in the morning, and Blue Tang die in the evening. I am very disappointed. I email Dr Tim's website asking for help. 20 hours goes by no response. I am so disappointed. I am totally mourning my death fishes.

I met Dr. Tim at a local reef show. After talking with him a while I ended up purchasing 3 or 4 of his products to give them a try (talking directly to the guy that has the education and research for the company certainly is a way get some confidence about the company.) This is one of the products I purchased. My water is usually pretty clean and doesn't smell but I figured the time might come where it would be useful. Sure enough I ran in to a plumbing problem that impacted my sump with an area that was getting very little circulation so it got a little stale. I wasn't going to be able to get to fixing the problem for a week so I figured I would try the Revitalizer. Followed the instructions and in less than 48 hours the smell was completely gone. I now keep a small bottle on hand as part of my supplies.