I actually just found these calculators earlier today, huge help, so I dosed tonight accordingly, will continue over the next couple of days. I've been dosing according to instructions but I guess that's to maintain. Someone mentioned to increase by 20% but it wasn't making a difference. Tank is not heavily stocked with corals. I've bought reef crystals salt to see if that makes a difference too and will do another water change this weekend.
Thank you for your help, much appreciated!
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