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Old 03-08-2006, 01:52 PM   #1 (permalink)
JRJ
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Default green water - need UV or diatom filter?

My 46 gallon has been afflicted with green water for the last 4 weeks. Most plants seem healthy, Nitrate, Phosphates, etc., seem normal, and 70% water changes don't change the situation much.

I'm on the verge of buying a UV unit - which I really don't want to spend the money on. I do have an old Magnum HOT filter. Does using that with diatom powder work just as well?

Also... Any suggestions on what I might do to prevent this crud from coming back if I do get rid of it?

-Russ
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Old 03-08-2006, 02:16 PM   #2 (permalink)
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I've had really great luck with the HOT Magnum with diatom powder. I know MatPat has too because he was the one who told me about it.

Bill
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Old 03-08-2006, 04:58 PM   #3 (permalink)
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I've used my Magnum 350 w/ the Micro cartridge and diatom powder to reduce the green water, but it took a couple of HUGE water changes along with that to get rid of it completely. I had to change the powder several times, it took several hours, and it was a severe PITA! I think it probably could have been done more effectively. I have a SoilMaster sized bag of diatom powder if you go that route.

I think my green water started from disturbing the substrate too much and not doing a water change immediately afterwards.
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Old 03-08-2006, 04:59 PM   #4 (permalink)
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I think Rob nailed the cause of your GW. I can get GW anytime I want by uprooting a bunch of plants and not doing a water change afterwards.

My HOT Magnum works wonderfully on my 75g when I have cases of GW. If I notice the beginnings of GW in the evening, I put the HOT on the tank and run it overnight. It is usually clear in the morning. Sometimes I do have to run it all the next day to get the waer crystal clear.

It sounds like you have a good case of GW. What I would do is a large WC to get as much out of the tank as possible. Then I would start the HOT running on the tank and mix up 2 ounces (1/4 cup) of diatom powder in 8 oz of water. Put the container of water and powder under the intake of the HOT and uncap it. It takes a minute or two but the HOT will eventually suck the mixture into it. If you're impatient like I am, make sure your container has a large enough hole and put the intake of the HOT right into the container. Works like a charm
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Old 03-08-2006, 05:04 PM   #5 (permalink)
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Hey a double posting, great!!! My Time-Warner Road Runner (cable modem) connection sucks so bad that I can barely surf or post to message forums very well anymore.

Boycott Time-Warner Cable. They are crooks and their product sucks balls!!!

Sorry to trash your thread Russ.
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Old 03-08-2006, 05:54 PM   #6 (permalink)
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Hey Rob,

I fixed your double post

Unlike GCAS, you can go in and delete your post using the edit function. I don't think it is only your connection today. I am very slow also and not just on here. There have been several sites today that have loaded very slowly for me. Must be the rainy weather or something.
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Old 03-08-2006, 06:05 PM   #7 (permalink)
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Quote:
Originally Posted by rwoehr
I have a SoilMaster sized bag of diatom powder if you go that route.
Is this diatom powder made for an aquarium diatom filter? I used diatom powder from a pool store once while I was waiting for a mail order and it was the only time my water wasn't crystal clear within a couple hours.

Bill
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Old 03-08-2006, 06:12 PM   #8 (permalink)
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Quote:
Originally Posted by stcyrwm
Is this diatom powder made for an aquarium diatom filter? I used diatom powder from a pool store once while I was waiting for a mail order and it was the only time my water wasn't crystal clear within a couple hours.

Bill
Bill,

Yes, I do have the pool version. From what I can remember, it's supposedly the same stuff. Let me find the link....
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Old 03-08-2006, 06:17 PM   #9 (permalink)
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Very interesting Bill! I have heard a few people say the HOT did not work on their tank and it makes me wonder if maybe the "pool" diatom powder is a larger grade.

Rob, if we can remember, why don't we each bring a 1/4 cup of our diatom powders and compare the two at our next meeting. We may have to do it outside since BW3's may not be too excited about two guys carrying around little baggies of white powder We are still meeting at BW3's aren't we?
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Old 03-08-2006, 06:33 PM   #10 (permalink)
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I am using a Vortex D-1 diatom filter with powder from a pool supply house and I must say it works great. I get GW in my soil tanks if I uproot plants. I didn't think I had any in the last week but ran the filter on it just for kicks and the powder turned green overnight. I do switch the powder out often if the tank is very cloudy that I am polishing,other than that i use the powder multiple times...
I don't recall if they make different grades of Diatom powder or not,maybe that could be the problem and if so it would be in the hands of the supplier to which grade they sell.
I have purchused some at HD in the past and ran it in a HOT filter and it worked great.
HTH Russ,Good luck with the GW.
BTW I have some crypts for you, let me know if you are coming to the next meeting,it will give me a little more time to cultivate them a little more.
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