Puzzling results, but definitely time to stock coralYeah ill stop testing it from now on. I did check with other salifert test kits to confrim mine wasnt a fault and it did give the same results but moving on from that now im nit going to stress about that! Time to look into coral. Any tips for my first coral ?

What are you interested in? Most soft corals, mushrooms and Zoas are quite forgiving and often where many start, and what I would suggest. You can have a beautiful soft coral display tank, and it doesn't tank a lot of knowledge about water chemistry and dosing, etc. Simply doing regular, partial water changes with a decent salt mix (Instant Ocean, etc. is fine; don't spend big money on salt until you *need* to) is all that needed for most softy tanks.
There are easy stoney corals too, both LPS and even some SPS. It might sound silly at first, but I would let a price tag guide you to some degree. In general, if it's cheap, it's easy to keep and grow. There's certainly exceptions to that, like when a fancy name gets assigned to an animal, but generally, if a shop is willing to sell it inexpensively, it's likely an easy to grow coral

Here's an older video from Mad Hatter's Reef that I think is good place to start:
I am a big fan of Than Thien from Tidal Gardens, a well known coral farm:
