donkey said:yes as zig says co2 will help a lot with your algae but you need to keep it around 30ppm .not sure if you can get it up this far on a yeast mix ? but if it were me i would attack it on two fronts . with good co2 and a RO filter as you say there only about £30ish from Ebay so its not a lot to pay . i had lots of algae problems till i went with co2 and a RO filter .
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What way were you fertiliseing your tank when you experienced algae issues?
The majorithy of algae cases in highlight planted tanks are caused by co2 issues.
High levels of phosphate will not induce algae this has been proven again and again with the estimative index.