Salfirit Test Kits

Zaphod · 02/01/2006, 08:46 PM

What is the deal? How much of a color change do you need? a slight color change?

Zaphod · 02/01/2006, 09:33 PM

Nobody? Salifert Test Kits are tough to read. It says pink or red orange for ALK. I get a very light pink. On the calcium how clear blue oes it need to get?

xtrstangx · 02/01/2006, 09:44 PM

After there is *some* change, (like a light light light blue) I add one more drop and read that. After I add that drop, it is a very big difference in color. HTH

Zaphod · 02/01/2006, 09:59 PM

same thing for the alk? when it turns a slight pink?

Spuds725 · 02/01/2006, 10:06 PM

Calcium and alk tests are both titration tests--- endpoints (where they change colors) is hard to determine exactly because of the small volumes we use-- I'd use the full color change-- the partial is likely just short of the reading....

You might want to contact salifert and ask them though...

I was a chemistry major in College--- the endpoint is typically where the color stops changing, not where it starts to change-- you can increase the accuracy by using larger volumes (multiples) of water, dry chems, and your titrating liquids

mg426 · 02/01/2006, 11:05 PM

I would say that the endpoint is when the colour fully changes. Make sure you swirl the tube between drops and always use the same procedure each and everytime for consistant results.

02/01/2006, 08:46 PM	#1
Zaphod Registered Member Join Date: Sep 2003 Location: Acton,CA Posts: 1,402	Salfirit Test Kits What is the deal? How much of a color change do you need? a slight color change? __________________ - Nick Current Tank Info: 90 gal Mixed Reef

02/01/2006, 09:33 PM	#2
Zaphod Registered Member Join Date: Sep 2003 Location: Acton,CA Posts: 1,402	Nobody? Salifert Test Kits are tough to read. It says pink or red orange for ALK. I get a very light pink. On the calcium how clear blue oes it need to get? __________________ - Nick Current Tank Info: 90 gal Mixed Reef

02/01/2006, 09:59 PM	#4
Zaphod Registered Member Join Date: Sep 2003 Location: Acton,CA Posts: 1,402	same thing for the alk? when it turns a slight pink? __________________ - Nick Current Tank Info: 90 gal Mixed Reef

02/01/2006, 10:06 PM	#5
Spuds725 Registered Member Join Date: May 2005 Location: Toledo, Ohio USA Posts: 2,051	Calcium and alk tests are both titration tests--- endpoints (where they change colors) is hard to determine exactly because of the small volumes we use-- I'd use the full color change-- the partial is likely just short of the reading.... You might want to contact salifert and ask them though... I was a chemistry major in College--- the endpoint is typically where the color stops changing, not where it starts to change-- you can increase the accuracy by using larger volumes (multiples) of water, dry chems, and your titrating liquids __________________ "I only have time to neglect one tank"-- Me "I don't want to achieve immortality through my work, I want to achieve immortality by not dying"-- Woody Allen Current Tank Info: 125G mixed reef with 135G Sump

02/01/2006, 11:05 PM	#6
mg426 Registered Member Join Date: Jan 2006 Location: maryland Posts: 6,923	I would say that the endpoint is when the colour fully changes. Make sure you swirl the tube between drops and always use the same procedure each and everytime for consistant results. __________________ I found a way to make a small fortune running a reef tank. Start with a large fortune. Unofficial President of the SEACLONE haters club Current Tank Info: 125 mixed reef 110 lbs LR, 1x250watt XM 20K MH 2x175watt XM 20K MH on Magetics 2X96 watt actinic PC, 220 watt VHO actinic, 30 gallon refugium, closed loop system powered by Sequence Dart MSX 200 skimmer 38 gallon sump, Oceansmotions squirt

02/01/2006, 09:44 PM	#3
xtrstangx Premium Member Join Date: Mar 2005 Location: Shawnee, Kansas Posts: 4,568	After there is some change, (like a light light light blue) I add one more drop and read that. After I add that drop, it is a very big difference in color. HTH