White mold/fungus issue!

here's the deal

1. Problem : white mold or fungus on top of growing medium and in the drain holes of the pots

2. Growing medium: Rockwool granulate in about 3" pots

3. Lighting: indoors under 250 HPS 24/7

4. Water schedule: They were being watered by flood and drain every 2 or 3 days as needed but now I am just dipping the pots in the res for a few secs to soak enough water so they are on the brink of drying every day I feed with Canna Aqua using atm 390 PPM Vega with 30 PPM epson salts every watering.

5. environmental controls: constant occilating fan on the plants max temps 81F lowest temps 68 F with fresh air entering anytime temps hit 80F MAX humidity 40%.

6. Age: Plants are about from 6 weeks to 3 weeks old all in Veg

pics below






Im sorry for the picture quality this is like the best of 30 pics even ><.

For the details.

My Res is never over 77 F but it is just sitting under my ebb and flow table (no lid but no direct light either) I have some sort of clear scum stuff floating in the rez I treat my 30 gallons with 45 ML of 35% H2O2 every 2-3 days. the scum tends to cling to the air bubble on the surface made by my 12" air stones. if I apply H2O2 directly to it it barely fizzes. Not sure if this is related to my mold on my growing medium as that is my real concern.

This mold does not seem to effect my plants in fact it seems to try to avoid the roots and stem( as sort of seen by my terribad pics.

I have added styrofoam plates to cover up the tops of the pots this has had zero effect. I dont feel it feeds on light as I have the same stuff growing in the drain holes with no light exposure.

The only source of this white mold/fungus that I can think of was when they were seedlings I had a natural seasponge giving off humidity and I saw on it the other day som white spots.

Thanks for any help

Jipc

I was looking at my res a little better and I discovered that my water pump filter was FULL of the slime that was floating in bits in my res. I pulled off the filter and cover and dosed it all with a ton of H2O2 and I will rinse it out and then hit it with a bleach solution. I also dosed my now about 25 gal res with 60 ML of 35% H2O2 to hopefully kill anything else in there I will let it dissolve out for about 16 hjours or so till I give anything else more water.

Either way I dont feel this is the same mold/fungus though on my rockwool ...but it may be......

any suggestions would be appreciated!

Jipc

i had this problem before, i found out that the plant wasn't taking up enough water and was sitting in the soil. soil started growing mold very fast.

thanks for the response.

ok Ill see if the plant kinda "grows" outta it then. The larger plants I have don't seem to have as much of it I hope thats the problem

check each day to see if the medium is still wet

well Im only watering when the plants are "crying" now the pots are basically no wieght what so ever. WAYYY dryer than any soil Ive ever done lol.

water them and see how they drain, check also to see how long the water is in the pot for

since this problem has taken off more I have changed the way I water. Im in a ebb and flow set up but with my plants different sizesd I tend to water certain ones more often by hand. I was watering by pouring water from the top of the rockwool letting about 10% or 15% runoff happen, but when I was doing that it would take about 3-4 days for the smaller ones to dry out before I could water them again. So when this mold/fungus took hold I started letting the pots dry out even more to the point of basically TOTALLY drying out and then just dipping the bottoms of the pots in the res for about 5 to 10 seconds. just enough so that the pots gain some wieght and are drying out after one day.

I think I am screwing with my plants too much though with all this watering crap. I should be ble to water once every 3 days imo and be fine just this damn mold/fungus ><


Jipc

hows it looking?

same basically >< a couple are worse with algea growing and turning black but the others I just decided to transplant most of them but I still have 5 that are in the smaller pots. When I transplanted them I just tore off ALL the molded RW and just replaced it with perlite. Im now using perlite mainly and will be flooding multiple times as needed but only 3/4 of the way up the pots so the top perlite will stay dry. I just hope that this stops the mold/fungus on the bottom of the pots. Hopefully I can get it under control. If worst comes to worst Ill just take cuttings and when they root Ill trash the whole veg room and sterilze everything ..... hopefully it wont come to that ><

Jipc

solved the problem?