Black little spots on my Nana Leaves

[gabrie]

Hi ,

I have some black spots on my Nana leaves cannot be removed manually..
Add Wonder gro "Green and Red" twice weekly and CO2 @ 1 BPS with 10hrs of light 24W 1 feet cube tank..
Any idea whats that?? and seems like no success of Riccia growing too...

Thanks

Gabrie

[beetlejuice403]

Hi gabrie,

think the spots that you saw are dark green in colour... These are known as Green Spot Algae (or GSA in short) & they are very common to be found on slow growing plants like Nana... These are usually caused by prolonged duration of too-strong light on such plants - so you wish to reduce the photo-period or the intensity of the lights...

Personally, my Nanas also used to have these GSAs growing on them, found it much easier to simply snip off the leaves [if your Nana plants have enough remaining leaves to continue photosynthesis after that] with the spots then to try & remove the spots... If water conditions are right, the Nana will sprout new leaves very soon...

Do try to spot if there are similar dark green spots (No Pun intended here... ) on the inner surface of your tank as they like to grow here also... If have, simply used a plastic card to scrape them off the surface... Horned nerite are supposedly to add in ridding of such GSAs also which you may think of getting to put into your tank....

Hope the above helps...

Hi ,

I have some black spots on my Nana leaves cannot be removed manually..
Add Wonder gro "Green and Red" twice weekly and CO2 @ 1 BPS with 10hrs of light 24W 1 feet cube tank..
Any idea whats that?? and seems like no success of Riccia growing too...

Thanks

Gabrie

[gabrie]

Thanks Beetlejuice

Will try to move the NANA away from the lights

^_^"
Gabrie

[beetroot]

I used to have those black spots too on my nana. Black... not dark green. Very ugly. Put a horn nerite snail on it... and hahahaha... all gone! So clean . The nerite snail did a fantastic job. I couldn't snip away, because not many leaves and all have black spots.