I use TopSpec balancer, and it works wonders on my horse, but the only problem is that it's really expensive, and my horse gets through it pretty quickly!! I'd highly recommend it, but the price is an issue:L
I have dispensed with all vits minerals and balances and am now feeding Pure Easy. Mare has never looked or behaved better. It's not cheap but cheaper than pots of different stuff.
I use Baileys Lo-Cal balancer, during the summer I buy a bag a month, I have 4 Arabs and a New Forest pony. At the cost of £24 a bag that works out to be £ 4.80p each horse. In the winter I will get through maybe 2 bags.
All I add is a mixture of Alfa oil and Redi Grass , plus hay in the winter.
I use Pure Fibre Balance and Mag OX for my good doers
Baileys Stud Balancer, Just Grass and Micro Linseed for youngsters
3yr old get Baileys Stud Balancer at half the rec dosage
I use this http://www.equineanswers.co.uk/prodpage.asp?ProdID=1
Equine Answers 365 complete balancer. I changed to it from Pink powder for cost reasons. I'm very, very impressed with it. All 3 of mine are really looking fab this summer
I am using 365 complete and magnesium oxide on mine and farriers Favorite ( which you feed with 365 complete) on the two with poor feet they look great 365 complete is very good value and offer excellent levels of supplementation