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Flourish Excel got rid of all my algae

451721 Views 286 Replies 134 Participants Last post by  tiger15
Well I finally found a local source of Flourish Excel. I was in the process of adding it into my tank when my little girl ran into me from behind. Needless to say I dumped quite a bit in. At least 5 times the recommended doseage. 2 days later my bba, spot, and green fuzz algae is gone. No sign of it anywhere. I think I like this stuff!
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Spectacular Failure

So... after spending hours reading this thread I decided to give it a try.

My fish all died today.

I had a horrible BBA infestation in two tanks. One was a 10 gal heavily planted, the other was a 30 gal only about half planted (due to many of the plants dying off because of the BBA). Both were adequately lit but no CO2.

We gave a 20% water change, dosed 4x the "water change" amount (did 4x instead of 5x to be on the safe side), and then changed the filters for good measure (they were due for a change anyway).

I didn't check the tanks until about 10 a.m.; I found about 2/3 of the fish dead and the water extremely cloudy and foul smelling in the 30 gal. The rest of the fish were at the surface gasping for air.

Filters are running normally, temperature normal, water change last night was the way we've always done it.

I rescued as many fish as I could. Now I'm trying to decide whether to tear down the tanks and give up trying to save the plants, or letting the process continue to see whether the BBA will go away then re-introducing the fish later.

Any thoughts?
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Hi justjulie,

First, I am sorry about your loss. When I lose fish I always feel badly but I try to use it as a learning experience so I don't repeat my mistakes.
Thanks, Seattle Aquarist--I really appreciated the sympathy! I feel I have a stewardship for my fish and I feel horrible for letting them down. :(

I'm quite astonished that I could have made such a terrible mistake. I have no idea how I got the idea in my head to do multiples of the water change dose. I'm a little embarrassed, too, but I'm glad I shared this so others won't make the same mistake.

I like your idea and may try it with the remaining plants.

Do you happen to know how Vals react to the H2O2? I have one really beautiful one that has some of the BBA.

bba turns a fluorescent Orange after being treated with H202 (hydrogen provide).
And then what happens? Do the fish eat it?
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