Thanks, I've posted there too. I've only had them a week, the platy's. I bought them from cascade in bury, Manchester. They have a good reputation and have never seen me wrong.
I bought my plec there, and my 3 gouramis. And they have all been fine. My ammonia is rising, and I'm on that daily. I think I was too rough with my filter sponge and killed a lot of the bacteria when I did my last clean out and floss change.
I'm going to try abyss in Stockport, apparently they are huge and very knowledgeable. We will see.