Just run all your parameters at the extreme high end...calcium at or even above 500, alk at the high 12's or low 13's, temps at 81 or 82, good but not overly done lights, and high sg 1.026 and it will start off growing pretty darn quick. I have run high levels on all my newly established tanks and can usually get somne coraline growing within the first 30 days or so as long as I have decent live rock with decent coraline growth to begin with. I am not of the faith that puts any belief in seeding with transferred coraline, nor am I of the belief that brushing it with a tooth brush helps spread it. I have yet to ever add mag, strontium or any oter su0pplement but Calcium Reef builder or B-ionic , and never ever wasted money on Purple up. Coraline will come in time when conditions for it are correct.