UltraClear Aquarium Kit. Perhaps one of the most important kits that every aquarium keeper should have to keep their aquarium trouble free with water quality. This kit includes a 4 ounce bottle of UltraClear Freshwater Complete, a bacteriological and friendly bacteria that will keep your aquarium water pure. A 4 ounce bottle of UltraClear Flocculent that will rapid clear the water of debris and cloudy water. One bag of 3 gram tabs of UltraClear Digester for eliminating organic sediment in tanks. And, one mini Buffer Block for buffering freshwater pH and adding calcium. Without a doubt, these 4 products in this one kit will help keep an aquarium in excellent condition.