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black/green algae

widow-maker

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Joined
29 Oct 2020
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41
Location
croydon
Could someone please help me identify this algae i have it on some of my anubius leafs the algae is impossible to rub off the leafs i have co2 injection and fluval plant have alot of plants fluval plant. dosing with tnc complete tap water has 1ppm phosphate and around 20ppm nitrate
thanks
 

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John q

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6 Jan 2021
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622
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Lancashire
Looks like Gsa and BBA, possibly some diatoms.

Reduce the light intensity, maybe 50% for now and might need to add more phosphate but until we know your fertiliser dosage its hard to say for sure.

Read this and give the details it asks for and you'll get more targeted help. (Correct link added)
 
Last edited:

John q

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6 Jan 2021
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622
Location
Lancashire
110 litre tank 20ml tnc complete twice a week
Well according to rotala butterfly you're adding 0.364 ppm of phosphate per week. You probably need to add more phosphate.

If you want better advice you need to read the link above and give the answers to the questions it asks, show some pictures of your flow/outlet positions as well, I suspect your co2 is suspect as well.

My bad, wrong link 🙄
 

widow-maker

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29 Oct 2020
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41
Location
croydon
have really good growth for the last 6 months just seem to be having this algae start randomly growing. find attached placement of powerhead and co2 difuser i have noticed the bubbles seem to only reach half way across the tank and the plants are only moving half way across the drop checker is on the other side of the tank and goes lime green
 

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John q

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Jeese, I'm having a bad day, you're actually adding 0.72ppm of phosphate but might still not be enough.
i have noticed the bubbles seem to only reach half way across the tank and the plants are only moving half way across
Definitely having issues with your flow then. I'm not a co2 user so won't attempt to give advice but answer the questions below and I'm sure you'll get some good advice. Oh, and don't forget to dim the lights.

1. Size of tank in litres.
2. Age of the set - up.
3. Filtration.
4. Lighting and duration.
5. Substrate.
6. Co2 dosing or Non-dosing.
7. Fertilizers used + Ratios.
8. Water change regime and type.
9. Plant list + When planted.
10. Inhabitants.
11. Full tank shot.
 

widow-maker

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thanks for the advice the lights have already been dimmed…. i would put a more powerful powerhead in but im not keen dont want to smash the poor fish with the flow i have a 800 litre per hour powerhead at the moment
 
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