the question u ask about floats is virtually unanswerable cos youll get that many different answers youll wished you never asked it.For example i know a 5x world champ who uses a 0.6g in 12ft+ of water and says thats the way but his mate uses 3g in 5ft of water!!!!!!!.all i can say is use a bulk n a few droppers n short hooklengths,when i used to use it i used to thicken my tips up so you could dot the float to a dot and could see it in any background conditions,think about it most of the time you use bloodworm is when the light is bad, no leaves on trees so the background left a bad shadow on the water,winter time,i used to get ridiculed over it said i needed glasses but my team results spoke for themselves