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Old 11-15-2011, 05:14 PM   #1
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Water Changes

Hi,

I have a 175L tank with at least 25Kg of live rock in. What would be the correct volume (L) to change during water changes ?

Many Thanks
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Old 11-15-2011, 05:19 PM   #2
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I would change out about 15-20% weekly, so maybe 20 litres or so.
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Old 11-15-2011, 05:27 PM   #3
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Hi, I have 5 tanks. only one being sw. I have been very successfull in all of them. I never do water changes. Once in a while I will do a vacuum on my 125g Cichlid tank just because they are very dirty. If you have enough water movement the water wont get so stagnant. Most people say I'm crazy but it works for me, and no problems.
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Old 11-15-2011, 06:08 PM   #4
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Quote:
Originally Posted by Wyatt1
Hi, I have 5 tanks. only one being sw. I have been very successfull in all of them. I never do water changes. Once in a while I will do a vacuum on my 125g Cichlid tank just because they are very dirty. If you have enough water movement the water wont get so stagnant. Most people say I'm crazy but it works for me, and no problems.
Never a water change? Water always tests ok?
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Old 11-15-2011, 06:22 PM   #5
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Tests?!?!?
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Old 11-15-2011, 06:51 PM   #6
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I know it may sound crazy but no water changes and yes evey test comes out good. Although I think that having alot of live rock makes a differance. Water always goes through cycles there for water will test a little differant everytime. If you have a tank that is over stocked with fish then you may want to do a water changes. My fresh water tanks are way over filtered. like my 125g tank. I have 2 marineland bio wheel filters each one does 90 gal and a marineland 350 which does 100 gal. No water changes works for me. And it may not work for someone else. Water changes with sw tanks seem crazy to me. Adding new water with the exact salt levels with whats in the tank now. When the water evaporates the salt doesnt go with the water it stays in the tank. So do you account for that when making new water? I just add distilled water. All my levels are good.
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Old 11-15-2011, 07:27 PM   #7
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Waterchanges get rid of excess nutrient in the water and with the fresh saltwater it replaces trace elements that are used up. I don't care how good your bacteria is in your tank, to have a saltwater tank you have to change the water. Yes your levels are ok but without waterchanges a tank will crash. Think of it like this: Fish wast and excess food will always be in the tank, if you don't change the water it will just build and build because every time you feed you add more and more wast to the water.
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Old 11-15-2011, 07:37 PM   #8
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15 to 20% water change every two weeks will do fine,using a salt like instant ocean reef crystals.
Wyatt1 is confused about saltwater PWC's. You remove the amount of water from the aquarium first that you are replacing with the mixed saltwater.
Regular RO or distilled water would be used for top off since the salt stays in the tank.
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Old 11-16-2011, 03:32 PM   #9
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Thanks for all your comments guys. Decided on 20% every 2 weeks to start with. Only got one clown fish at the moment so shouldn't be producing too much waste.

Thank again
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Old 11-16-2011, 06:52 PM   #10
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Quote:
Originally Posted by cjbaker
Thanks for all your comments guys. Decided on 20% every 2 weeks to start with. Only got one clown fish at the moment so shouldn't be producing too much waste.

Thank again
Sounds good,remember water changes not only remove excess nutrients,but replace Alk,Cal,mag. So on that your corals and Coraline algae need.
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