Join Date: Aug 2012
Location: Santa Barbara, CA
Algae getting worse, do I need CO2?
I have a 20 gallon high with nearly 4WPG (I have some high light plants in there), and recently I've been seeing a rise in algae on my plants.
My nessea is covered in some sort of black algae (not the hair type) along with BBA. The new leaves look OK but as they get older they gain algae, presumably because they aren't growing as fast.
My Anubais has lots of GSA on nearly all the leaves, but I believe thats because I have high light. It's still growing well, so I'm not too worried about it.
I also get GDA on my glass about every week. I always clean it off when I do a water change, but it comes back every week.
Currently I am dosing Excel daily at the normal dose and Flourish every 4 days or so. I do a 30-40% water change every week. Water parameters are ammonia 0, nitrite 0, and nitrate 15-20ppm (can't tell the difference between the two colors on the chart). I run two filters, an aquaclear 30 w/purigen, and an aqueon 30 with just media, no carbon. Lighting is 4x18W T5HO's, 3x6500k plant bulbs, 1x10000k daylight, on 12 hrs a day. I also have a bubble wand in the back of my tank on all the time.
I just started a double dosing of Excel because of some of the algae articles I've read. We'll see if that helps. Other than that, because I have such a high light tank, should I just get a CO2 system? I've been on the fence about it for a while, and I'm definitely considering this as an opportunity to jump in. According to many algae articles I've seen my algae varieties all seem to have 'Low CO2' in their causes...
I can post pictures later if need be.
Last edited by Ductapemaster; 08-30-2012 at 10:32 PM.
Reason: Added more information about tank