Growth on soil...Mold? Mycorrhizae? Mycelium?

[Bkeith12]

Have been getting white growth on top of my soil. I think I've narrowed it down to these 3 I think. Weird thing is if I let it go for 24 hours it turns into cakey yellow growth. Just need tonknow opinions on what it is to see if it is harmful, neutral or beneficial. Have 20 different pots of transplanted clones and seedlings. 4 different strains. Happening in every single one of the pots. Never had this happen before. Only difference this grow to others is in started using Recharge by Real Growers, Mammoth P and Have two Exhale 365 bags in veg room. Which is 5x10. Have only fed PH water (6.0) with recharge.

Meduim: Pro Mix HP with added perlite.

Lights: 4000k 480 watt Quantum Boards

Temps : 79-84
RH: 50-65%

 

[Trickyticky]

Salt build up of nutes maybe ??
Cannot really see

 

[Bernie420]

Have been getting white growth on top of my soil. I think I've narrowed it down to these 3 I think. Weird thing is if I let it go for 24 hours it turns into cakey yellow growth. Just need tonknow opinions on what it is to see if it is harmful, neutral or beneficial. Have 20 different pots of transplanted clones and seedlings. 4 different strains. Happening in every single one of the pots. Never had this happen before. Only difference this grow to others is in started using Recharge by Real Growers, Mammoth P and Have two Exhale 365 bags in veg room. Which is 5x10. Have only fed PH water (6.0) with recharge.

Meduim: Pro Mix HP with added perlite.

Lights: 4000k 480 watt Quantum Boards

Temps : 79-84
RH: 50-65%

If it bugs you then scrape it off and add a new layer of dirt to replace it.
suggest to use mammoth P during mid to late flower due to cost of product...you have plenty of microbes in the recharge for any veg...and actually dont need mammoth P at all but whatever...

the exhale bags aint doing much if anything ...again a cost issue imo. ....especially in a veg situation...you want the extra co2 in flower to stack buds.