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Discussion Starter · #1 ·
I have a bad case of green water. I tried turning lights off for a couple of days and it worked but its back I dose all ferts and Co2 and ideas of how to get rid of it or is UV the only way to go. Thanks
 

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Well green water is caused by low or fluctuating nutrients/co2 or an ammonia spike.

Are you using diy co2?

What fertz are you using and dosing regimen?

Have you had a fish or invert die?
 

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Discussion Starter · #3 ·
It pressurized CO2 and does mircro and macros every other day havent had anything die in there that i know of. Did a major trim maybe need to cut back on dosing since not as many plants in there taking up the nutrients.
 

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How's the water flow in your filter ? When I replace the impeller on my canister filter, green water never came back.
 

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Discussion Starter · #6 ·
Flow is decent its a magnum 350 maybe ill put some carbon in it would that help i know it will take some of ferts out but ill do anything to rid of the green water. Will clean filter out and try that maybe it is time for a new impeller as I have had it for a few years.
 

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I would recommend more water changes within the week. Maybe 2-3 times a week with each time around 40% water changes or so. That's from my experience of getting rid of algae. Good luck!
 

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I've only found two sure things that work for GW. That is a UV and a Diatom Filter. Water changes from my experience will not help. Sometimes GW goes away with time, but it could be a while. If you can set it up in line the UV is the best since you pretty much set it and forget it. I ran mine 24/7 without any negative effects on plants or put on when you need it.
 

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Discussion Starter · #9 ·
I've only found two sure things that work for GW. That is a UV and a Diatom Filter. Water changes from my experience will not help. Sometimes GW goes away with time, but it could be a while. If you can set it up in line the UV is the best since you pretty much set it and forget it. I ran mine 24/7 without any negative effects on plants or put on when you need it.
Where can I get a decent one at since I am looking at a new filter as well. I have tried WC and it does nothing. And what do you think is better diatom for UV comparing price and usefulness.
 

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UV will clear it up faster then anything. The diatom filter I use is a H.O.T. Magnum with Diatomacous earth I purchase at a pool supply store very cheaply. The diatom filter will help but it won't clear it completely as it will just continue to grow exponentially before you can clear it all up. Get the UV and it will be gone in a matter of hours. Water changes will make it worse as you are just feeding it with the new water your putting into the tank.
 

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I just had a bought of green water. I chose not to buy an UV sterilizer. I cut back on natural light (I.E. closed the blinds), cut back on tank lighting, and added a thirty minutes with no tank light in the middle of the day. A couple of weeks later, I did a massive water change and it seems all good. My tank did look crappy for a couple of weeks though.
 

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Discussion Starter · #13 ·
Looks like im getting a UV then since it seems like that is the way to go. Tank is a 75 gal so guess 9 watt is way to go. When I get this should I leave it on all the time after the water is clear thanks
 

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Discussion Starter · #14 ·
HOC do you think the JBJ filter with UV would work as I dont know much about them its an all in one unit of should get seperate units. Found the turbo twist for 120. and also the top of water has some type f film on it like an oil slick. Thanks for all the help everyone as this is first time with this everything was going good for a while
 

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I agree with everyone about using UV. After I installed mine about a year ago my tank has been free from green water algae blooms. I only have a 5 watt unit and it works fine in my 52 gal tank.

Just one important point, UV works based on exposure time. That means if the water passes through the unit too fast, it will not work properly. Usually, you cannot connect the UV to your filter outlet. Typically, you need to install a bypass from your filter outlet to the UV unit to regulate the flow through the sterilizer. This is not hard to do but you need some plumbing to go with the unit.
 

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Discussion Starter · #16 ·
Just one important point, UV works based on exposure time. That means if the water passes through the unit too fast, it will not work properly. Usually, you cannot connect the UV to your filter outlet. Typically, you need to install a bypass from your filter outlet to the UV unit to regulate the flow through the sterilizer. This is not hard to do but you need some plumbing to go with the unit.[/QUOTE]

Ray can you direct me to a link in what parts I would need to do this or can i just go to plumbing dept and get it from there. Is it just a valve thing that you can open and close pretty much. thanks
 

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new2plnts, I see you are on the path for UV so go for it. Just wanted to note that I have used a Magnum 350 with diatom cartridge and the powder to clear green water in my 180g. I figured since you are already using a Magnum 350 you may want to try the diatom method since there is a diatom cartridge available for that unit. Cheaper/less time consuming than UV if you don't have a recurring issue.
 
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