Algae/ Fungus Id Needed!

[RyanV]

I will post the pictures below. The tank is a 20g/75l tank that is dirted with miracle grow organic soil and topped with black sand. Everything was pre-soaked for weeks before adding to the tank. I have plants in the tank with about 48watts of t5ho lighting. I have been using liquid Co2 until Christmas when I will get my pressurized system. The tank has now been set up for about 2 weeks. About a week ago I started noticing a small area where this white cloudy stuff started growing on the substrate. I removed it right away with a siphon and it keeps coming back and seems to be spreading now to other parts of the tank! I don't want to have an infestation with this stuff so any help is greatly appreciated!

EDIT: You can also see in the second picture I had put a few neon tetras in to help the cycling, and they all died the next day..is this stuff poisonous or was it something else?

 

[WILDER]

Substrate vac. Increase aeration.
This link below explains very well a bacterial bloom.,
Link
http/www.fishforums.net/index.php?/topic/246850-bacterial-blooms-explained/

Neon tetra are very sensitive fish and need to be in mature tanks of at least six months.
This is probably why the died.
Sorry for your losses.

 

[RyanV]

Thanks I will read that! The tank has no cover on it though so the aeration should be good. Never had this happen in my other tanks

 

[WILDER]

I had white cloudy stuff on my gravel when I first set up a new tank.
I just preformed a gravel vac. Also removed the cloudy white stuff on my plants with a toothbrush,.