Keeping to a known formular

It is always difficult to know when you first start printing, which developer and paper combination to go with. Pick one and stick with it. It is not a good idea to keep chopping and changing in the beginning.

The best way to approach this is to choose the developer that the manufacture recommends for their film and paper. They have spent a lot of time researching what works the best. Once you have become used to developing and printing you can start to experiment if you wish.

Antonov An2
Film Ilford FP4+ 6x6 neg, developed in Ilford ID11,
printed on Ilford Multigrade RC gloss,
 processed using Ilford multigrade paper developer. 

PMK Pyro solution part B.

As mentioned in this post the developer is divided into two parts as a stock solution. Part B is the larger quantity of the two and suffers from settlement where the powder comes out of suspension and accumulates at the bottom of the bottle. Before use, you should shake the bottle well so that it goes back to a milky colour. It would seem that the larger the crystals in packet B the more drop out there will be. I have not yet found a method that stops this.