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Water change thoughts.....
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#1
April 28th, 2008, 06:23 AM
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Water change thoughts.....
I never really thought about it before, but here's a question :
If I don't top-off my tank before the water change (maybe less than 1 gallon low) and I fill the tank with new water to the full tank level, how does this affect the tank? Mind you, this tank is small, 30g. Will the salinity grow to immense levels over time if left unchecked? I know the water evaporates and the salt stays, but how does that combined with full water changes really affect the full tank salinity? Hmmmm. Current Aquarium(s) Description: 30 gallon, 2 clowns, starry blenny, purple wrasse, LPS, Softies, Polyps Experience in Saltwater & Reef Aquarium Hobby: Enough to put a nice dent in my bank account! 
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#2
April 28th, 2008, 06:55 AM
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Re: Water change thoughts.....
short answer? Yes. Only replace with new salt water the amount you take out. Then, use RO water to fill the tank to the top. Over time your salinity will get too high and start harming your livestock
-Doc Current Aquarium(s) Description: 210 gal "Shark Reef" With Angelfish and 90 gal reef tank Experience in Saltwater & Reef Aquarium Hobby: long enough to know I have a lot to learn
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| The Following User Says Thank You to Doc For This Useful Post: | ||
cgoodman381 (April 29th, 2008) | ||
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#3
April 28th, 2008, 07:01 AM
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Re: Water change thoughts.....
Doc is right.
__________________
They see me moderatin', they hatin'. Sarah 
Current Aquarium(s) Description: 240-gallon reef with a 55-gallon sump and 35-gallon refugium Experience in Saltwater & Reef Aquarium Hobby: 7 years
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#4
April 28th, 2008, 12:48 PM
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Re: Water change thoughts.....
Some type of mark should be made on your tank to denote the full water level and daily the water should be topped off to refill to that mark. At the least top the tank off with freshwater when you can obvouslt tell that the water level is below the mark you made.
Current Aquarium(s) Description: 120g SPS Mother Colony Tank, 40 g sump, back wall overflows, 2 closed loop circulation circuits 59X Experience in Saltwater & Reef Aquarium Hobby: 35 years in marine aquarium trade and managing LFS's, 10 years with coral. Other Intrests: Coral Propagation, Civil and Environmental Engineering, Cabinetry, and Reef Systems Development
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#5
April 29th, 2008, 04:46 AM
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Re: Water change thoughts.....
on 30 gal the salinity could change too quickly to keep everyone happy if you go too long between water changes, definitely want to top off daily, or at least every other day at the max with fresh RO
Current Aquarium(s) Description: 110g tall reef w/ lots of SPS, koran+pygmy angels, more Experience in Saltwater & Reef Aquarium Hobby: since dec 06 Other Intrests: Reef aquaria, Disneyana, music, soccer
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