Ah yup, elevated phosphate = cyano + hair... Sry 
The pH will drop very slowly over time, but probably won't dip as low as it was before with your new aquascape. Prolly dip down to the 8.2 range over the course of a few weeks or month

The pH will drop very slowly over time, but probably won't dip as low as it was before with your new aquascape. Prolly dip down to the 8.2 range over the course of a few weeks or month

, the hair only the last month or so, before I moved the rocks. Since then (only 6 days), no hair algae as yet, and the cyano has slowed a little, but I added more flow, so might that have affected it?
. A stunning Radiant / Iridis Wrasse whom we've called Willard. He's a friendly little fella, and has made bosom chums with our angel. 