Black mold

Black mold grow on the sand/rock of the fish tank?

 

Welcome to 3reef,

You have what appears to be a bad case of Cyanobacteria. There are different types, therefore different colors.

I would start by evaluating your flow and increasing that if you need to, testing for phosphates and nitrates and lastly manually removing it.

 

Here is what I posted in the other thread:

Wow, you have a lot going on there. My guess is the black is cyano. You also have bubble algae, plus some good size aiptasia. How long has the tank been running? What size tank, and what is your filtration? What are the parameters? What kind of water do you top-off with? What do you have for livestock?

 

-Ultralife RED SLIME remover Cyano Algae killer-?

Please

 

Are you using RODI water? What are you using for powerheads?

 

You need to fix the problem. Red Slime remover is just a band aid.

 

It would help if you answered some of my questions above

 

Siphon out the cyano, and evalute your flow and nutrient levels as posted by Corailline. Also please answer Marshall's questions. This will allow us to better help you. Welcome to 3reef.

 

you can use Maracyn (erythromycin) as a last resort to kill cyano, but you need to practice better husbandry before you use chemicals. Solve the root problem. There are excess nutrients in your tank that are allowing the cyano to flourish. Evaluate your filtration, feed less, or perform more frequent water changes. If you could tell us more about your tank, the fish in it, your filtration and water parameters and your maintenance schedule we can help you out more.

 

How long has the tank been running? 4 Month
What size tank, and what is your filtration? 24 gal (108 L)
What are the parameters?
What kind of water do you top-off with?
What do you have for livestock?
Tasseled
Percula Clownfish X2
Mandarin Goby
Pyjama Cardinalfish X2
Domino Damsel X1

Porcelain Crab
Green Emerald
Clown Orchid Shrimp
True Mexican Turbo Snail
Super Nassarius Snails X5
Dwarf Blue Leg Hermits X4
Minstral Starfish
Black Brittle starfish
Boxer / Pom Pom Crab
Electric Blue Leg Hermit Crab
snails X5
Nudibranch X2

5 x ANEMONE/REEF/FISH/CORAL/MARINE/ANEMONES
Feather Duster Coral
Pulsing Xenia Live Coral
finger soft coral
Green Star Polyp Coral Frag
Yellow polyps zoa