Green "Really Hard" Spot Algae

[MKFMedic]

Sorry no picture, but I have a 30 gal rimless tank with good parameters:

pH 8.2
Amonia 0
Nitrite 0
Nitrates less than 5

My stocking is three Chromi's, 1 true percula and a firefish. Several pieces of healthy and happy coral.

Growing on the front curved corners of my tank there is a "Spot" green algae which is particularly hard to remove. It can be done with a blade scrapper, but not the standard tank magnet cleaner. It definitely forms in little spots. Anyone have any ideas on what it might be? I have heard that it could be similar to a coraline algae, but as it is the front corners, I want to remove it. I do have some spots of coraline (Pink/Purple) beginning to grow on the back and do have the typical brown algae that comes and goes within the tank.
Just curious,

Mike

 

[all4wheels2]

I'd say coralline algae, as it can be green too. It's ridiculously hard to remove.

 

[MKFMedic]

Thanks for your thought. It is a bugger to remove and because it is in such a tight curve, I have found the best way for me to remove it is with the tip of a finger nail.

 

[Hinds04]

A plastic spoon works well as a scraper. I filed my fingernail way down once without noticing... never again.

 

[MKFMedic]

Thanks for the spoon tip. I was trying to use my fingernail and some of the more stubborn stuff just wouldn't budge, so I used a metal scrapper which worked better. The spoon will definitely fit into he curved portion of the corner much, much better.

Mike

 

[Sniperhank]

I use a toothbrush...but I'm trying to spread the spores and keep what is already there in place.