Instantly creates a mist of tiny bubbles that your fish will love, The Green Bubble Wall Tube evenly distributes fine bubbles in your tank. Bubble wall comes complete with suckers to attach it to your aquarium and a free converter to add additional bubbles walls. Additional bubble walls can be jointed with the enclosed connector, can be cut with a razor bladed to devide or shorten. You can use a pin or a needle to puncture with as many small holes as needed.