I dont have the pastel colours yet, but i beleive it happens when your nutrients get very low, not low po4.
I supplement with trace elements so at this stage i dont have that problem.
Iwan also uses t5s only so you do tend to get pastel colours also.
Fays tank is looking pretty clean as she also doses biodigest.
I use biodigest, biotim and reef booster which contains amino acids.
I dose weekly bt will be looking to do it fortnightly as my tank looks clean enough.
I also dose active bak which is a carbon source for the bacteria, you can use vodka also.
Iwan uses the same prodibio products.
That cant be. he has a sand bed
I was reading that BB was popular in the 1970s. looks like it is coming back,