Identify these algae

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Jah410

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Original poster
May 12, 2019
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Hi guys, so I've been struggling with alage for months now and I want to see if anyone can identify what these algae are. I'm attaching some pictures of various plants and hardacape in my tank

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fishorama

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Jun 28, 2006
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SF Bay area, CA
Haven't we seen you tank in another thread? I looks to me like cyanobacteria (blue/green "algae") & diatoms. Too much or too strong lighting can lead to either.

How often do you clean your filter media? Do you have windows that allow direct sunlight & heat into the tank? What is your maintenance schedule; how much, how often?
 

Jah410

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Original poster
May 12, 2019
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Yes, the other post is more geared toward the assumption it's all diatoms though. I wanted to make a more specific thread just identifying what the algae was.

I have a very good cleaning routine I thought, very good with water changes weekly. I dont have the tank near a window so perhaps I should lower the photoperiod again? Which picture indicate cyano? If so, would I be best off treating with erythromycin?
 

Jah410

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Original poster
May 12, 2019
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Oh and to give more specifics. I do 30 percent water changes weekly. I have filter floss as my media and I squeeze that out into the bucket of siphoned water a few times to remove detritus with each cleaning.
 

fishorama

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Jun 28, 2006
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SF Bay area, CA
That's good but until you find & fix the cause of cyano it will come back after antibiotic TX, sorry, that's my experience. High light, higher heat...in my cases (both coasts), those were the big problems, but also high or no nitrate can add to the problem. I've been in the "seasonal rollercoaster", it's very frustrating!

Your wisteria leaves look like they have some cyano (BGA) to me. Cut your light down to 6 hours/day & maybe build to 7 or 8. That can help with the diatoms too.

You might also try the "total blackout" method. No light from anywhere! Wrap the tank in trash bags for 3 or 4 days, no peeking/ no feeding...nothing! But...IME it's not a long term answer...
 
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