"Shawn" wrote in message ...
I'm not a chemist. Can someone tell me what KNO3 is and where I can buy it
? I've been battling green water algae for a couple weeks now with no
success. I'm 2-day past a 5-day black out. I wrapped my 55gal in a heavy
blanket and duct-taped it shut. 5 days later I took it off and had crystal
clear water ! I was so happy. However, it's not been almost 3 days since I
took off the blanket, and the green water is reappearing. I was just
looking up UV sterilizers online but then I saw this post below, and I'm
wondering if that might be a fix without having to buy UV equipment. I'd
like to solve this problem as inexpensively as I can !

Thanks - Shawn


Hey, I'm having the same problem with my 30 gal. After the blackout my
water was clear as a bell, but now its starting to fog up a bit again.
This time I'm just gonna let it run its course. My plants took a
severe beating because of the blackout, so I'm not about the do
another one. I'm not sure what the cause of green water is?? I think
someone said it may be an ammonia spike or biofilter tampering.
Whatever the case, waiting it out seems to be a common solution..

If it gets any worse you can go to the flocculant (water clarifier) as
a last resort. I know a lot of people are against adding the chemicals
but after looking at a green tank for 2 weeks it might be the only
answer.

Nick













Thanks Marvin,
I have read up on UV sterilizers and was
wondering if they would be a solution. I will check it out and see what
happens.

Before investing on an equipement. kepp Light and CO2 on, dose KNO3
1/4 tsp every other day.

Just try
Dominic