I was petsitting and the owner used an inferior product leaving his 75 gallon saltwater tank in horrible condition, I could see that many of his fish and anemones had died. Since I had to take care of it for 6 months I consulted a local expert and had him come evaluate the condition of the tank. He recommended this product and pow! It knocked that overbearing algae right out of the tank, and safely I might add. Followed directions and did recommended partial water change. (Obviously the owner hadn't taken this step for many months) I was so thrilled to save this tank. Highly recommend.
Rating: [5 of 5 Stars!]