Tomato Feeding Question

All of my greenhouse toms have done their bit now - we've got loads of tomatoes of all shapes & sizes, I guess they're not going to get much bigger now, but just need to ripen.

My question is - do I need to continue feeding them now, or, as they've probably mainly reached their ultimate size, is just watering sufficient. Perhaps I'm being a bit tight, but I don't see any point in paying for further feeds if it's not necessary 

Tomato feed ? ? ? 

handfull of blood, fish and bone before planting and a sprinkling of chicken muck pellets,  and let them get on with it !      Cheers,    Tony

I seem to remember that you quit using tom feed and use general feed later in the season.