How do I get rid of this slimy green algae?

[MaloK]

Thanks to both of you for the replies.

@MaloK - I'm surprised at such big water changes. I thought these were bad for the fish, as the sudden change of temperature and chemistry would shock them. I've always gone for 30% max.

Well if you use temperature matching water on a regular basis and do larger water changes...

The chemistry will remain stable in the long run. Some peoples experience fluctuating hardness with the seasons, that is sometimes not ideal.

Still better for the fish health than cyano turning your tank in a poisonous green blob.

 

[Yossu]

Still better for the fish health than cyano turning your tank in a poisonous green blob.

That's one way of putting it!

 

[MaloK]

That's one way of putting it!

I hate that stuff