What do you guys think about Flourish tabs?
http://www.seachem.com/products/product_pages/FlourishTabs.html
If I have a 20 Gallon tank with plain gravel as a substrate, is it worth it to use these?
http://www.seachem.com/products/product_pages/FlourishTabs.html
If I have a 20 Gallon tank with plain gravel as a substrate, is it worth it to use these?