Cloudy water!!...help - The Planted Tank Forum
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post #1 of 24 (permalink) Old 02-10-2003, 11:37 PM Thread Starter
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Hi guys..I started changing to RO water (20% first change) ...and noticed my ph was high 7.6!..Used ph down to lower ...observed water was a bit cloudy..so I used Acurel F to clear the water ...3 drops per gal. It is meant to give you "crysal clear water within an hour"! Several hours later my water is 5 times cloudier and looks like I poured milk in the tank! Any suggestions to get rid of this problem?
2 x 55W Power compact, 2 X 40W Powerglo, 2 x 65W Coralife Power compact ; Laterite substrate, DIY CO2
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post #2 of 24 (permalink) Old 02-10-2003, 11:45 PM
 
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Initially the water will actually look more cloudy when you add Acurel. Thats because acurel coagulates the particles in the water and makes them larger so that your filter can trap them. You will probably have to rinse your filter media after a day or two because the media will get clogged with these larger particles.
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post #3 of 24 (permalink) Old 02-11-2003, 12:04 AM
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A good suggestion is to not treat your tank like a chemistry set. Only add chemicals to fertilize the plants. Don't use pH down or up. Use CO2 to control pH. Don't use chemicals to clear up the water. Find out why the water is cloudy and treat the problem not the symptom. You don't list how big your tank is, but I can see you have a lot of light there. 320 watts if I'm not mistaken. DIY CO2 just doesn't cut it at those light levels.

Do you know what the pH is out of your tap? And the kH of your tank also.
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post #4 of 24 (permalink) Old 02-11-2003, 12:39 AM
 
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Like Rex suggested, test the pH of the tap. I was a bit shocked to find out that the pH of my tap water is 7.6.
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post #5 of 24 (permalink) Old 02-11-2003, 12:43 AM Thread Starter
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Tank is 90 gallon, tap water ph is 7.6 and tank kH is 6 deg
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post #6 of 24 (permalink) Old 02-11-2003, 01:09 AM
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Why would want to use R/O water in the first place? I use it only because my tapwater is from a watersoftener and it is not too good to use in an aquarium due to the high sodium content. Infact water just from a watersoftener is not even good to drink!!!
The watersoftener will take care of the GH where it is 0 dh but the ph is 8.5 and KH is aroun 13 dh. So I will use R/O water to lower the KH to around 5 dh and will need to add some R/O Right, a supplement to raise the GH to around 5 also. For the Ph I have a DIY CO2 set up and that will keep the Ph down to 6.8-7.0.
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post #7 of 24 (permalink) Old 02-11-2003, 05:56 PM
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OK, a 90 gallon tank with 320 watts of light is a pretty fast tank. DIY CO2 just won't cut it on a tank like that. If your pH is 7.6 and the kH is 6 in your tank then your CO2 levels are 4.5 ppm, which is not that much greater than would be expected with a non-CO2 injected tank. You would want to get your levels up to around 25-30 ppm which would drop your pH to 6.8-7.0.
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post #8 of 24 (permalink) Old 02-11-2003, 08:48 PM Thread Starter
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Rex, what is your recommendation on CO2 equipment to get? Thanks
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post #9 of 24 (permalink) Old 02-11-2003, 11:28 PM
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Depends on how much you want to spend. You can go all out and spend the monthly rent or you can do it like a sane person and piece it together. Piecing it together is a royal pain in the a** though. The best thing to do is get something like the system you can find on AquaBotanic.com Robert has a system for $213 that includes the regulator, needle valve, tubing, external reactor, and bubble counter. All you need is a cylinder. And unless you live way out in the sticks you can get one from the local fire extinguisher shop or welding shop.
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post #10 of 24 (permalink) Old 02-12-2003, 12:10 AM
 
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I'd like to know what your set-up is and what it is that you want to do .

I think I'm hearing someone in the throes of a technological fenzy. Watts! RO! Chemicals to control this and that!

Why do you want to change the Ph? I'd kill to start from 7.6 pH. You ought to be able to lower the pH from there by CO2 alone, if you really need to. RO water can add up to quite an expense.

What are you trying to accomplish?
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post #11 of 24 (permalink) Old 02-12-2003, 12:46 AM Thread Starter
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Thanks for the tip Rex. Will check AquaBotanic.com.
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post #12 of 24 (permalink) Old 02-12-2003, 12:41 PM Thread Starter
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Days later ...water still cloudy!!! Should I consider doing partial water changes or still wait it out?
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post #13 of 24 (permalink) Old 02-12-2003, 05:15 PM
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Well if the water has not turned green we know it's not an algae bloom. It could be a bacterial bloom. In that case changing the water will only be a temporary solution. You need to find out what is causing the cloudy water and cure that. Treat the problem, not the symptom.
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post #14 of 24 (permalink) Old 02-13-2003, 01:59 AM Thread Starter
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Lo and behold ....took a close look at water in clear glass ...greenish tinge ...so I am assuming algae bloom!! Did partial water change and connected a UV sterilizer (one of my spare ones for the second koi pond). Will the UV have any harmful effects on the plants/fish?
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post #15 of 24 (permalink) Old 02-13-2003, 06:50 AM
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I might not have a direct effect on the lants or fish but I believe that a UV sterilizers will kill off the bacteria that make up your biological filtration.

Still don't know why you wanted to use R/O water!!!
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