Grow like a pro - if you want to grow incredible plants like Mandy does here is the main ingredient. Iron rich clay fertilizer bombs! Place under heavy root feeders or just drop in a tank. Also a special treat for shrimp and isopods. No more than 2 per 5 gallons of water monthly for heavily planted tanks. Adjust according to your plant load. Has everything you need to grow an aquatic plant. Iron, potassium, nitrogen, calcium, micros, and macros. They can even be used for house plants. One per gallon pot per month.