Terrible Advice Tuesdays: A haze-like film of algae on your tank’s glass means your tank has a nutrient problem.
The rest of the story: The amount of nutrients needed to grow a haze-like film of algae on your tank’s glass is much, much less than the nutrients needed to grow enough algae for a full-on algae outbreak. (A full-on algae outbreak to me means large mats green hair algae covering the rocks as well as cyanobacteria outbreaks.) Think of it this way: if you were going to give a pound cake a powdered sugar dusting, you’ll use far less powdered sugar than if you were going to cover it completely. Returning to the algae outbreak, more algae means more nutrients needed to grow the algae.
Of all the tanks I, or my clients have run, including ultra-low nutrient (ULN) tanks, the haze algae film always shows up in varying degrees. On my tanks, I notice the haze building up 3-4 days after I scrape down the tank with an algae scraper. Some of my clients can go a week to a week and a half before they need to scrape off the film. Regardless of scraping intervals, the film still occurs even though these tanks do not have an algae problem or nutrient problem.
Where I would start getting concerned is if your scraping intervals drops significantly. Ie…seven days to two days. If that occurs, then I would look for a rise in nutrient levels.
Dealing with algae outbreaks or want to prevent them? My algae guide is on sale until May 6thBrowse the Store! Questions?