I use KwiK Clear 2 part finings and for me its the best and fastest out there but it can be difficult to get hold of unless you buy on-line, Youngs Clear it is close second but doesn't have a long shelf life once opened, if you decide to get either get yourself a syringe from the chemist as it makes measuring so much easier (go for one about the size of a pencil or thinner as the bottle necks are quite small.