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Re: green water

Roxanne Bittman asks...

>Oh, green water woes.
>My 40g tank has been problem free for a long time;
>crystal clear and healthy.
>I went on vacation and came back to find it full of pea
>green soup, yuk.
>Problem is, I have tried all of the remedies seen on the
>web and I still have green, cloudy water, albeit a little
>bit less green.
>What I've tried:
>1.  darkened the tank for three days
>2.  added flocculent (Kent's Pro Clear) to bind the
>algae so the filter could pick it up.
>3.  Used a System 1 diatom filter for four hours.
>4.  Massive water changes.

You didn't try my posted remedy Roxanne. Add nitrate.
Green water seems to occur in tandem with zero nitrate.
You may also wish to decrease the light intensity slightly
until the plants regain the upper hand.

>I still have green water.  Testing and my knowledge of
>the system tell me that there should NOT be excess
>nutrients in there; I didn't have the fish fed during my
>month away.  The plants are doing OK, but their
>growth seems slowed.  Glossostigma has lost some

There is a deficit.

>Any suggestions would be appreciated.

Dave Whittaker
ac554 at FreeNet_Carleton.ca