Sonds good Ski, means the mag test kit will last slightly longer, no point testing if I don't need to. The basic tests I have a good feel for and know when I need to test, just was not sure with those for supplements.
I have to agree, the UV is fantastic for green water, now I can see in to the tank properley I can see the snails have had a field day as the amount on the rocks has halved, I will let them do their thing, adds a bit of colour and not a problem unless it gets any worse.
Slight delay on refugium but should be here this week, the seller was working away. I will change the rowaphos again whilst swapping it to the refugium and then I am at a point where I will be able to see any increase in growth and monitor phosphate levels.
Thanks again, problem well solved.