You consider 2 heads to 15/20 slow growers? Wow1 What is your secret! MIne grow very slow, My ph isnt above 8 so many be thats why and I cant think of an easy way for a woman to get the ph up! LOL. I keep hearing never use a ph bosster because it ups alk but i know there are some that claim they dont. I am going to post a pic of some zoas sold as infrared but I know they are not because I just got some nighmares in that look alot like them but brighter! Do oyu are anyone know what this zoa is? Sorry pic is so blurry!