My water for my turtle and 40 gallon fish tank was rating at 8.0 tested with the API Master kit.  So I got this and regretted it. It made my previously crystal clear water cloudy like it was a foggy London day. Before, my fish and turtles looked like they were flying in mid air. Now I can sort of see them in the back of my tank only 18 inches away. I tested the water a full day later and it brought the tank down only 2 points. Not even close to 7.0. Even if it eventually brings it to 7.0, it isn't worth if if it's cloudy. I have a Rena xp4, by the way, with chem zorb, matrix, and sponges. I went and bought a purigen pack even though I have a pack of chem zorb in my xp4 because it wasn't doing anything to clear up the cloud.

The purigen made my water crystal clear in less then 12 hours. I've since bought 2 liters so I don't have to change it so often. My turtles and fish look like they're swimming in mid air.

By the way, I've read PH balance is a hyped up factor. The other water balance issues are more important. Fish will adjust to the PH balance. The range I've read is pretty big. As long as it doesn't fluctuate a lot. So far, my fish and turtles are active, have a good appetite, and are having a blast in the jet stream my xp4 makes in the tank. =)
My water for my turtle and 40 gallon fish tank was rating at 8. 0 tested with the API Master kit. So I got this and regretted it. It made my previously crystal clear water cloudy like it was a foggy London day. Before, my fish and turtles looked like they were flying in mid air. Now I can sort of see them in the back of my tank only 18 inches away. I tested the water a full day later and it brought the tank down only 2 points. Not even close to 7. 0. Even if it eventually brings it to 7. 0, it isn't worth if if it's cloudy. I have a Rena xp4, by the way, with chem zorb, matrix, and sponges. I went and bought a purigen pack even though I have a pack of chem zorb in my xp4 because it wasn't doing anything to clear up the cloud. The purigen made my water crystal clear in less then 12 hours. I've since bought 2 liters so I don't have to change it so often. My turtles and fish look like they're swimming in mid air. By the way, I've read PH balance is a hyped up factor. The other water balance issues are more important. Fish will adjust to the PH balance. The range I've read is pretty big. As long as it doesn't fluctuate a lot. So far, my fish and turtles are active, have a good appetite, and are having a blast in the jet stream my xp4 makes in the tank. =)