Hello there, I have had good experiences with HC. If you give it a fine substrate, high light and decent C02 levels it won't disappoint. I have a ten gallon set up using HC as the ground cover, in under 2 months it has completly covered the substrate from front to back, pretty thick to. I have 5 tanks running at different light levels, from very low to very high light, C02 and no CO2, good substate, average and poor. I have tried HC in them all. In my experience, it does best in high light and CO2. Without a sandy substrate, or at least a pretty fine substrate, HC does not do well. It just won't stay planted or spread much at all. High light, 20 to 30 ppm C02 and good substrate, I'm using eco complete, = happy, fast growing HC. If you can give HC those conditions I would highly recommend it. You won't be disappointed. Good luck.