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Re: green water hell
On Thu, 17 Dec 1998, Roxanne Bittman wrote:
> I wrote about one month ago that I had a green water
> problem after a one month vacation. It cleared up
> briefly after a couple of 25% water changes plus the
> addition of Kent's Pro Clear.
> However, it came back! Despite water changes and
> Pro Clear, it returned. It's mad now too, because
> NOTHING I do is getting rid of it. What I have tried:
I recall that I had a green water problem (now gone) that started around
the same time as yours. I used a flocculant and ran a Magnum 350 w/micron
filter over night to clear the water. That worked, but the green water
rebounded to the cloudy-but-not-real-green stage for about three weeks
running. I was out of town over Thanksgiving weekend and when I returned
the water was as thick as it ever was.
The green water is now completely gone. I used daily focculant treatments
(with Hagen P Clear) and ran the Magnum w/micron filter continuously for
several days in a row, changing and cleaning the filter each day. I also
suspended all fertilizing and reduced fish feedings.
Reducing the fertilizing and feeding probably slowed the phytoplankton
growth rate, and the continuous filtering kept the water clear for a
continous period of time. I think that the clear period let the rooted
plants (and unfortunately some blue green algae) accelerate their growth
and take over from the phytoplankton.
I have left the tank unfiltered now for two weeks and the water is still
crystal clear. I haven't returned to my previous fertilizer routine - I'm
looking for convenient and inexpensive ways to replace foliar fertilizing
with substrate fertilizing because green water is a recurring problem in
this tank. The blue green algae that expanded briefly when I was running
the filter is now in a gradual retreat.
I imagine that our green water problems are as unique as our aquariums, so
this expience may or may not be of any use. This worked for me, good luck