I'm running 1L of vertex BP in 250g system for the last 7-8 months.
Initial No3 10-15ppm and P04 .003
Results as follows
Cyano, cyano, cyano for the last 4-5 months.
Hair algae
diatoms
Zero P04 and No3
High bio load
SPS are growing, colour on some are great others are ok.
I've lost 3-4 zoo frags, brain is half the size, lost 3 heads of hammer, 3 head of frog spawn and my Fiji yellow leather hasen't been open for months. But before it started to close it was the brightest fiji yellow leather on earth. It was brownish before the BP.
I just recently took them offline about 5 days ago. I was dosing CS and zeobak for 17 days beforehand and nuttin. Since I've taken the BP offline, the cyano seem to be less blanket like and more patchy. I've also been dosing Zeozym, zeobak and coral snow mixed for 8 hours and dosed with skimmer off for the last 6 days. Tonight is the last dose and then twice a week after that. I have my fingers crossed.
Bp do work but they have cause cyano, HA and diatoms in my tank. I plan on getting rid of the cyano first and possibly bring the BP back online, but this time only a small amount. Maybe 100ml and run it with gfo.
When I first started, I only added about 400ml for 2-3 months. Then i added the rest. I never had the cloudy water.
If you can keep your nutrients low with your current Husbandry, then stick to your routine. If you can't get your nutrients low then try BP, but don't be surprised when you experience these problems. I've read a lot on BP and I'm not alone with cyano.
Hope there will be more people chiming in.
-dan