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Green Hair Algae, It’s That Time Again…

Over the past couple weeks I’ve noticed a few crops of green hair algae popping up in the tank. My first reaction to algae is to check my water quality. After seeing my water quality seemed normal I was a bit stumped. So, I changed my RO filters (sediment and carbon) when I first noticed the issue, then changed my DI filter resin (even though my TDS was 0) here last week. Then I tossed out all my top-off water to start out with the “new” stuff. So here’s a picture of one spot where it’s kind of bad. It’s a little over-exposed but it highlights the algae. Hopefully after a week or two I will see a noticeable difference.

Green Hair Algae


Wintertime Green Hair Algae Bloom

Over this winter I’ve had a bit of green hair algae show up with one spot of cyanobacteria.  Since then I’ve continued the use of Phosphate Pads (backed off using them over the summer) and turned my skimmer up a little (wetter skim) in hopes to better my water quality. Picking out all the hair algae I could grab with tweezers and every other tool I’ve got has helped. I’ve also started to open the windows for 20 minutes a day to get some fresh air in, possibly lowering the CO2 levels in the house. I’ve always wondered if having the doors & windows closed during the winter has increased the CO2 levels in the house, which then enter the tank and promote algae growth… Lots of tanks I’ve seen over the past few months have had an algae bloom of some sort. Or, maybe it’s just a yearly cycle that we can do nothing about. Recently I’ve see where some folks are drawing their skimmer’s air from outside with indoor CO2 levels in mind.

Dolabella Sea Hares are good at eating hair algae!

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