Good morning Soilwork,
Thanks for recommending this as I have resisted dosing my micros this morning. I was half heartily going to do this but after your help and advise and reading the reports you sent me and going on from Darralls input I'm willing to give it a go as everything else seems adequate within my tank, good flow, co2, macros, good husbandry, sensible levels of light. I will keep a close eye on things for any changes whether they be positive or negative and will take it from there. I can't figure out what else it could be, so here goes!
Kind regards
Matt