I have 3 gallon carboys of wine going, 2 are rhubarb that I racked for the 1st time 4 days ago. the other is blackberry/raspberry that I put into the carboy the same date. I have the S airlocks on them. I know that the water levels are not an exact indicator of fermentation, but one of the rhubarb and the berry wine don't look like there is anything going on. The fluid levels are even. Do I need to worry about this? The room is steady at 70 degrees.