I'm using pressurized CO2
so my levels are better constant (and high). My calibrated ph monitor is reading between 6.35 and 6.6 ph a day.
My light is only 2x24w T5's with HO
plant bulbs with new reflectors, over my 46GA. A vague estimate would be about 2 wpg
The phosphate levels in the water are due to the tap water in Edinburgh which sits between 2.5 to 5 ppm
atm. It is very soft and comes from the lochs in the hills around edinburgh, which are fed from agricultural land (mostly sheep farming). But is considered very good drinking water.
I was sceptical when my LFS
guy suggested that the phosphates were the issues causing the algae as I have been reading here for a while, and the commonly held opinion is that BBA and other types are caused by deficiencies not excesses.
I havn't nailed my EI yet. It is still on my to-do list. But what I think is happening is my Nitrates are bottoming out at various points in the week leaving the excessive amounts of phosphates in the tank for the algae to feed on.
But with the large excess of phosphates in the tank I doubt my heavy plant covering is ever going to out-compete the algae feeding on that specific excess. I figure what my LFS
guy was getting at was - reduce the excess and allow the plants to do the rest.
Current plan - getting in the excel this week to blast it out and then EI to sort my dosing.