Maybe quitting Zeovit

[Snappy]

The ocean doesn't look like zeo tanks. For every pastel blue "wonder zippy" acro you see on a reef there are hundreds of dull brown boring ones. The super pastel colours are an aberration, a defensive reaction to photo saturation in a low nutrient environment. Promoting Zeovit as a way to get a "natural" looking reef tank is seriously silly.

Please don't take offence but it sounds like you've never been scuba diving on a reef before. As luck would have it I just got back from a holiday last night where I was diving and some of the sps colours I witnessed were absolutely amazing. That said not every sps is a bright colour but the most popular ones in the hobby are and zeo tanks can help them achieve their full potential. It's easy to keep a coral brown and still healthy but I personally enjoy a more colourful look. Now to address your point of "natural", since most of us have corals from many parts of the world together in a glass cage that would not be found together in nature the only way to get a true "natural" look would be to have a geographic specific tank. That goes for fish too.
I personally don't use zeo but I do carbon dose with pretty good results and I can tell you the principle behind them works. Yes you can achieve very good results without it but you can achieve even better results with it. I have tried many things and I'm not afraid to experiment and I can attest to the validity of zeo & carbon dosing. As mentioned it's not for everyone but since I tend to over stock I would have nitrate/phosphate problems without it. For me the hobby goes beyond just watching the tank, I enjoy the nuts & bolts of what makes what work, identification, propagation, photography, etc. One of the things that makes this hobby so great is there really is something for everyone at every level and you can taylor it to your own personal preferences.