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Jon Wilson wrote:
>So now I have a large tank full of algae and two clown plecos, nitrates
>at 40 ppm and phosphates at 5 ppm. I want to start over, but I'm afraid
>the algae is so firmly entrenched into the system that I may not be able
>to get plants going again. I would rather not try to bleach the tank,
>but I don't know of any other ways to kill all of the algae. Most of the
>algae is green and on the back glass. There are a couple small patches
>of blue-green in the substrate next to the glass. There is also a bit of
>brown (diatom?) here and there.
>I thought about doing a huge water change and just leaving it sit as is,
>with lights, and wait until the algae consumes all the nutrients and
>finally dies. Has this actually worked for anyone?
I was able to succeed using a modified version of this approach. Along
with letting the algae consume the phosphates and nitrates I used RO water
for 10% water changes weekly. I still had tetras and rasboras in the tank
and did not want to make huge changes to reduce the nitrate and phosphate
levels. I modified the RO water to proper Ca/Mg/Alkalinity using PMDD. I
calculated the proper dosage levels with the water in storage using Hach
test kits. That way I did not have to deal with changing the conditions in
However, my phosphates were never as high as 5ppm, which sounds incredibly
high to me.
Over the past 20 years, I have kept many different kinds of fish. My
favorite fish for a planted aquarium is the Rasbora. Don't let their
colors in the fish store fool you. Once they get settled into a tank, they
take on a beautiful orange irridence, which gives a planted tank a
character which is unique. They are active fish which are quite hardy
(they can live for greater than 4 years if not stressed).
Elk Mound, WI, USA