Thanks very much
It took me a while to work out the causes and remedies for algae problems. I tried many approaches over the years, including limiting and/or trying to balance nutrients, as excess nutrients or ratios outside of some magic number were often cited as the cause.
But I've come to accept that the light is the main culprit for both algae and, counter intuitively, poor plant growth, if not balanced with sufficient CO2, nutrients, water circulation and regular large water changes to remove organic waste. Light drives the plant to grow, and in doing so increases its demands for CO2 and nutrients.
Excess nutrients don't cause algae, but a shortage can, by virtue of stunting the plant growth. Stunted plants decay, decay produces ammonia, algae will bloom anywhere there is an ammonia source.
Some people don't mind it, but I hate algae, as you've probably already guessed![]()
I find that the presence of algae detracts from aesthetic value. It just looks unsightly. I'm sure many would argue that it has beneficial qualities, but your tanks are obviously flourishing without it.
