Review on 🔄 Renew, 4 Liters / 1 Gallon by Sejal Beasley

While it appears to do a good job of keeping the water clean, it doesn't help with odor absorption. I find that good quality charcoal is better at making water crystal clear and also absorbs odors. Since using this product I've noticed an odor that just doesn't seem to go away, even with a fresh batch. I've never had this problem with high quality carbon. I can't comment on the intake of the necessary elements, but I dose the elements in my aquarium and have never had a problem.