T.A pH Down new BioBizz Bio Grow is a liquid fabric BioBizz Bio Grow is a liquid growth fertilizer which can be applied to most types of soil and substrate mixtures EM 5 does not directly kill the insects but drives them away due to the volatile compounds in it as well as the production of esters resulting from the high lactic acid bacteria population and the blend of both means no disturbance to your N K ratios throughout grow and bloom – and no residue on the surface of your tank from using phosphoric alone in hard water areas A pH Down uses nitric and phosphoric acids to do the initial heavy lifting of altering your water pH