For what it's worth.... here's my experience.
I have a 77 gal mixed reef, I would call it mediumly stocked with a few SPS, LPS and softies. I was dosing 40-50ml/day of BRS's 2 part formula. (I had started with tailored aquatics Ca and dkh but ran out of money for that about 2 months in)
I recently bought a used Vertex RX4 from a fellow member here and I'm scratching my head wondering what the heck I was so scared of and why I didn't do it earlier. After 2 days of running it, it appeared I was dialed in. I've been running it now for almost 2 months and my Ca and dkh levels are rock solid and I've definitely noticed much higher growth levels and colour in all my sps corals.
Now I'm just worried that when I get my 210 up and running it won't be big enough
