Dark Green/Brown growth forming on top of Rockwool

[elgrecko23]

*THIS POST HAS BEEN MOVED TO THE CORRECT SECTION*

SEE QUICK REPLY BELOW FOR LINK

Hello all. I have a drip hydroponic system right now and am experiencing what I am assuming is algae, but fear may be mold on all four rockwool blocks of my small setup. I also see small white specs. Could this be nutrient/salt build up? I've attached some pictures here for reference.

Setup info: it is a drip system with CFL lighting. The drip runs for 15 min three times a day. The blocks stay moist, but don't appear to be too saturated. Right now the plants are about a month and a half old and are between 1 and 2 feet in height. The 4 x 4 rockwool cubes sit in 1.5 gallon pots with hydrotron clay pebbles. I'm using Canna Aqua Vega nutrients. The temp in the room stays between 75 and 90 and the area was thoroughly cleaned before setup. I have an Eva dry dehumidifier, Air purifier and small oscillating fan. The lights are on a 24 hour cycle right now for Veg stage. The leaves are all solid color and appear to be healthy, aside from the growth on the cubes. However I do see small brown spots at the base of the plant stalk. Is this normal?

I read up and feel that this is probably algae and that covering the blocks from the light should help, but am worried I'm about to start dealing with mold attacking my babies

I could use some expert advice.

Thanks in advance for the help.

 

[HippyInEngland]

Hello Elgrecko23

Your plant is not sick so your query is best suited to this section.

http://www.marijuanapassion.com/forum/forumdisplay.php?f=5

I only grow in soil so its best if the people with experience answer you :aok:

eace:

 

[elgrecko23]

Thanks HIE. I really appreciate it.

And so do my (fingers crossed) ladies.