Hey guys, Im just really getting into planting my aquariums, In my 29 gallon tank (just some bn plecos) I have a sword fern, and two other plants, i will post pics soon i have no idea what they are. I had them in my tank for a while and they werent growing much and they werent turning brown, so i decided to get some liquid fertilizer, i picked up a bottle of " Kent Marine Pro-Plant" and a bottle of "Flourish Potassium" Has anyone had experiences with either of these? I have yet to use them but if you have any tips on them please tell or just tell me what you would use instead! My substrate is gravel too.