I purchased two black cukes about a week ago. Last night when I got home I noticed one of them looked like he was losing patches of 'hair' (whatever the fuzzy stuff is that coats them). Some patches looked red, some white. He was also sliming up so I removed him. The other one (and the burgundy linkia star I bought at the same time) look fine. What could have caused this? I checked my PH (8.5). My alk was 7 dkh last night...I drip kalkwasser daily. SG was 1.027. My ammonia test was negative.