My system is  about a month old.  I've got a 150 gallon tank with no fish yet.  I've got a grow bed I filled with pea gravel and plenty of healthy vegetables.  My grow bed apparently with lime stone in it as well because my ph levels sky rocketed.  I've been adding a cap full of seasol a day right off the bat.  I stopped that four days ago because my water was turning brown.  about a week ago I s…