Not unless there is really something crazy going on with my batch, I do not add water to a batch after it is already fermenting. If you hit your target OG then the volume losses are just that. A loss. Just remember you have 4.5gl instead of 5.5 when you prime for bottling (if you bottle that is).
Drinking Pumpkin ale V2, Oaked Wee heavy, The Kaiser clone, Graff, Old Jubilation clone, Sour Cranberry Ale
Carbing/Aging Westy 12, Barleywine
In the bucket Peach Wit (FINALLY!)
On Deck Westy 12 (19X), Pumpkin Ale 2014, FBS clone, Port oaked amber, Old Rasputin Clone, 15% RIS