Zeovit Supplements can be added to tanks that aren't running the Zeo System. Supplements such as Pohl's Xtra, B-Balance, Iron, Potassium, Pohl's Coral Vitalizer, SPS Aminos, Coral Snow. These can all be used and with a little trial and error with dosing, your SPS WILL color up significantly. For example, Iron supplementation will increase green coloration, Stylo-Pocci Glow will increase Reds in those corals, B-Balance will increase coloration, Pohl's Xtra is a phenomenal product that will show results in all of your corals. Most of these products are used after one has reached phase 3 of the Zeo system which is canvasing your tank (or color paletting your tank) but they can also be used in regular systems. ZeoSpur2 is what you have to watch out for. And if your not using a zeo system DO NOT dose Zeospur2, Zeobak, etc... These are ULNS products and are for more experienced systems. Anyway, just thought I'd chime in.