Water test

gareth.hubbarde · 04/24/2017, 10:59 AM

How long after a partial water change would be ideal to test? Did 10% this afternoon, should I test tomorrow or a few days?

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scooter31707 · 04/24/2017, 11:04 AM

IMO, about a hour.

Blitzer · 04/24/2017, 11:20 AM

Did you test right before the water change? The only reason to wait is for the new water to properly disperse... but if you tested right before, then all you'd see is a 10% reduction due to the water change.

Ron Reefman · 04/24/2017, 01:49 PM

+1 to both the comments made above

mcgyvr · 04/24/2017, 03:56 PM

In general you can look at the flowrates of your powerheads/return pump to get an "estimate" of how long it should take to turn over all the water in the tank..

So if you have a 100gallon system and pumps/powerheads moving 1000 gallons per hour then a good approximation is 1/10th of an hour or 6 minutes..
I usually just wait an hour or so..

bnumair · 04/24/2017, 10:54 PM

30 min to 1 hr. Most tanks are turning over atleast 5 to 30 times over in 1 hr.

04/24/2017, 10:59 AM	#1
gareth.hubbarde Registered Member Join Date: Apr 2017 Posts: 719	Water test How long after a partial water change would be ideal to test? Did 10% this afternoon, should I test tomorrow or a few days? Sent from my SM-A310F using Tapatalk

04/24/2017, 01:49 PM	#4
Ron Reefman Registered Member Join Date: Jul 2009 Location: Cape Coral, FL Posts: 10,431	+1 to both the comments made above __________________ The good thing about science is that it's true whether or not you believe in it. (Neil deGrasse Tyson) Visit my build thread http://www.reefcentral.com/forums/showthread.php?t=2593017

04/24/2017, 03:56 PM	#5
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	In general you can look at the flowrates of your powerheads/return pump to get an "estimate" of how long it should take to turn over all the water in the tank.. So if you have a 100gallon system and pumps/powerheads moving 1000 gallons per hour then a good approximation is 1/10th of an hour or 6 minutes.. I usually just wait an hour or so.. __________________ Who me?

04/24/2017, 10:54 PM	#6
bnumair Dr. Reef at ur service Join Date: May 2009 Location: Tulsa, Ok, USA Posts: 7,751 Blog Entries: 15	30 min to 1 hr. Most tanks are turning over atleast 5 to 30 times over in 1 hr. __________________ Water Quality: NO3 0,Phos 0,Cal 440,Alk 7.5,Mag 1300 "Reef Fast, You Crash, Reef Slow, You Pass" Mike's Reef 3:16 Current Tank Info: 350g DT,95g sump, 50g Frag tank, 4800gph return 4x Sea swirls. 6x AI Vega Color. 200# Pukani rock, dual recirculating skimmer, Biopellet, GFO Carbon rx's, Cal rx. Closed loop. 1.5hp chiller, genesis renew. Apex & RKE

04/24/2017, 11:04 AM	#2
scooter31707 Registered Member Join Date: Feb 2015 Location: Virginia Posts: 4,971	IMO, about a hour.

04/24/2017, 11:20 AM	#3
Blitzer Registered Member Join Date: Mar 2017 Location: San Francisco Posts: 93	Did you test right before the water change? The only reason to wait is for the new water to properly disperse... but if you tested right before, then all you'd see is a 10% reduction due to the water change.