My tank has developed 'green water' seemingly overnight after a 70% water change yesterday.
The tank inhabitants are: spawning pair of angels and 6 julii cories.
The angels have been gasping at the surface for about two hours now. The cories are less active than usual and I've also noticed that my usual burrowing assassin snails are slowly making their way up to the surface.
I'm confused as the tank has been very healthy up to this point and because of the change yesterday.
I'm a bit worried that the change stirred the substrate up too much and that is to blame.
I've done a further 10% change in the last hour but it hasn't seemed to have made a difference.
Any ideas?
The tank inhabitants are: spawning pair of angels and 6 julii cories.
The angels have been gasping at the surface for about two hours now. The cories are less active than usual and I've also noticed that my usual burrowing assassin snails are slowly making their way up to the surface.
I'm confused as the tank has been very healthy up to this point and because of the change yesterday.
I'm a bit worried that the change stirred the substrate up too much and that is to blame.
I've done a further 10% change in the last hour but it hasn't seemed to have made a difference.
Any ideas?