You can run phos if you want but run the decent stuff Ultra power phos, but then you cant run ultra Bio!
http://shop.faunamarin.de/product_in...PowerPhos.html
As i said above you just cant use this with bio or bak. Using both would remove the PO4 way too quickly and cause imbalances. (remember the golden sentance with fauna products "They do what they say they do" So dose exactly as instructed.
When it comes to PO4 you have two options
1. Ultra bio and Ultra Bak
2. ultra power Phos
best results are achieved with the bio's as it is adding good nutrients as well as removing bad. Better results are obtained this way
But i suggest trying the bio first, take the natural approach, then only if you do not wish to continue the bio you can switch back, but feel free to put the phos back on until it arrives.