I’ve had my scape set up for 8 months. I used uns controsoil and dose nilocg thrive c 2ml twice a week. No co2. I do a 40-50% water change my weekly. The tank is a fluval flex 9 gallon. The stem plants have seemed to really slow down growing and I’m guessing the soil needs a recharge. I wanted to try tropica capsules but have red reviews of them floating when trying to put them in the soil. Does anyone know if that’s true or a better root tab to put in? Also will this cause a nutrient spike? Thanks for any help!