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Old 04-12-2007, 09:25 AM   #1
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Evaporation during Cycle

So my tank has been cycling for about 2.5 weeks and things are looking normal.

The only thing im looking at now is the fact my water level is decreasing because of normal evaporation. I know you guys say i dont need to do a PWC but should i add some more water at all to keep the level up? And if i add it do it the same way i would do a normal PWC, add salt to the water while heating it and test the salinity and slowly add it?

What are you all thinking on the cycle? Im very excited for this to all finish up and want to make sure i do things right!!
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Old 04-12-2007, 09:32 AM   #2
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FW evaporates and the salt stays in the tank which increases your sg. Only add FW to the tank to maintain your sg level for evaporation and only add well mixed SW (24+ hours with a PH and matching your main tanks temperature/ph/sg/alk) to your tank when you take out SW during your pwc.

Never add salt directly to a tank, it's caustic until thoroughly mixed and will damage your stock.

What are your current ph/sg/nh3/no2/no3/temperature levels currently? Are you keeping the lights off? How are you cycling i.e. fish less/live rock?
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Old 04-12-2007, 11:01 AM   #3
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The above advice is excellent.
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Old 04-12-2007, 11:02 AM   #4
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I know not to add salt to the tank so we are good there. Im at work now so ill have to get the reading when i get home ill let ya know.
Im cycling with the shrimp and live rock, obviously no fish. Lights are always off.
Should i keep a bucket of SW ready ike the day before i do a PWC, when im ready to start doing them?

So you kind of confused me on the adding SW or not. If my sg is to high, just add FW and if its fine add mixed sw?
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Old 04-12-2007, 11:11 AM   #5
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Quote:
Originally Posted by Jayhawker518
Should i keep a bucket of SW ready ike the day before i do a PWC, when im ready to start doing them?
I always have pre-mixed SW (or at least pre-mixed for a minimum of 24 hours). It is best to add a ph and heater to try and get the new SW as close to your tank's temp and pH as possible.
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Originally Posted by Jayhawker518
If my sg is to high, just add FW and if its fine add mixed sw?
If your sg is too high, you will want to reduce the sg in your next PWC. Micah was saying the evaporation would take out the FW since the salt doesn't evaporate, causing your sg to rise. In this case, you would just add FW.
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Old 04-12-2007, 11:27 AM   #6
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Ok that makes sense. I have the pw and heater for a mixing bin now so ill do that the day before a PWC.

Ill test the water after work and get all the info and see what we all think. Thanks for the help
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Old 04-12-2007, 11:32 AM   #7
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Anytime, keep us posted.
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Old 04-12-2007, 07:49 PM   #8
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Ok just took my readings for today tell me how you think i am doing.

Temp - 79 degrees
PH - 8.0
Ammonia 0
Nitrites between 2.5 - 5 range (darker)
Nitrates about 20 ppm

I have the master kit if that helps at all.
Also my salinity was high so i added some freshwater that was heating. Hope this will help.

Does this all make sense? It looks like im getting my nitrItes spike now and my nitrate will be sure to follow. Its about closing in on 3 weeks so i think that makes sense What are we all thinking out there?
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Old 04-12-2007, 08:23 PM   #9
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Looking good to me. What is your sg?
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Old 04-12-2007, 09:05 PM   #10
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Its 1.024 and about 34 ppm

Do these numbers sound like things are cycling well?

And any idea how much longer it will last? A week or so?
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