It sounds like you have root rot, or overferted roots. Get a digi thermometer for your res and get the temp. What system are you running? If its DWC then temps are extremely important.

drop your ppm under 1000 and add h202. Keep your res temps below 70 to be safe.

BTW slime is a huge sign of pythium(root rot).
The White Snoop Reviewed by The White Snoop on . Bubblicious Problems - Root rot? This is my 2nd grow. First grow was 1 NL x Shiva and a WW. Both came out nice but the WW was outstanding (IMO). 4oz off her. I didn't have a TDS or PH meter and rarely checked pH with dip paper. So now I have Bubblicious. Bought the meters. When I went to 12/12 one week ago, I used the GH chart (I have GH nutes) and was at 1100-1200 ppm with ph at around 5.6 ish. 400 HPS w/430w Hortilux. I have a bubbler system. First off, the plants are much spindlier this time. But the real Rating: 5