Need some help, thanks (1 Viewer)

[thomaslu]

Hi
I am new to the hobby.
I have been cycling my tank for about 23 days. Recently, I noticed that my green algae turn into black(or dark purple) with bubble in it. May I ask what that is and what should I do to get rid off it. Or I do not have to worry about it.
Thank you very much for help.

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[Diesel]

Welcome my friend.
what you see is Cyano Bacteria.
Tank is low on nutrients to feed to good bacteria to battle off the Cyano.
You can dose Bacteria in your tank in the morning right before lights come on as most bacteria work better with day light.
Also try to remove as much as possible to help the bacteria out to battle it.
You can do a water change and siphon the cyano of the rock with a hose and catch it in buckets.

 

[OceansX]

+1, probably Cyanobacteria.

If it's localized, I'd recommend vacuuming it out during a water change and watching that phosphates haven't spiked up. Because Cyanobacteria can 'make' their own nitrogen, they tend to prosper when phosphate is in excess.

From my newish set-up, I have several of these patches. They are slowly dying back with good regular maintenance. Somewhat annoying because I want to place a frag where a patch is, but I have to wait for the patch to die. #FirstWorldPorblems

 

[ilopez0321]

What do you call that bacteria. I would like to buy some as well. I'm starting a 29 Biocube.

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[OceansX]

You can purchase the nitrogen cycling bacteria (something akin to Nitrosomona sp./Nitrobacter sp.) from brands like Fritz, or get some old water and/or live rock. Call up a sponsor store or post here, and state that you're starting a new bio-cube, looking for a seed bacteria culture.

As far as increasing your biodiversity of bacteria that's luck from seeding from many different sources: commercial products, old water, live-rock, hitchhikers, purchases, etc. Marine scientists can count and see many 1000's of types of bacteria than we can NOT grow in a lab. I am unaware of any commercial product that sells a bacteria that will out compete another 'bacteria.'

 

[thomaslu]

Thank you so much for all that information. I tried to brush and pick them out by hand because they are around several rocks. I will do my first water change this weekend.
Should i do a 20% or more ?
Thank you very much for all the recommendation.

 

[Diesel]

What do you call that bacteria. I would like to buy some as well. I'm starting a 29 Biocube.

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Dr Tim one and only is a fast acting bacteria treatment that can if done right cycle your tank in 5 days.
The other method is to use a piece of liverock from a established running tank or a cup of sand from a similar tank.
Using old water is scientific proven that it doesn't add the bacteria in the right manner and it will take a long time to cycle, as bacteria are attached to rock, sand, pumps, pipes, dead corals, basically anything in a solid matter that bacteria can attach too.
Micro-lift is another brand that is pretty good and used by commercial companies for fresh and as well as saltwater use.

 

[rosebubblex]

If you're still having problems with this, Chemiclean https://www.amazon.com/Boyd-Enterprises-CC02-Chemi-Clean-2/dp/B00025YRJS
dosed correctly with extra air from a bubbler and a 2 day blackout tends to solve the issue for me. Make sure to do a 20-30% water change when you bring the lights back on.