dolomite? you have extremely soft water out there? and i love dirt tanks. are you kidding me? no need for root tabs for like 2 years, give or take. yeah, twist my arm, i HATE root tabs. but i will definitely get some of those clay tabs for later on down the road. crypts are heavy root feeders and they just LOVE having their roots in dirt. and since i have crypts in every tank, every tank has dirt. especially my rare crypt tank. too many special (to me) plants to mess around with forgetting to get root tabs and the like.