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ethank77
01/11/2009, 06:57 PM
How much mrs Wages do I disolve in 1 gal rodi.

reefnetworth
01/11/2009, 07:49 PM
one tablespoon per gallon will give you appx. 14.0 Alk.

reefnetworth
01/11/2009, 07:52 PM
give a man a fish, feed him for a day, teach a man to fish he will sit in the boat and drink beer all day. :lol:

i dont drink beer, but i love to eat Salmon, the other pink meat! :D

Logzor
01/11/2009, 07:55 PM
If you are trying to create a limewater that is not fully saturated ignored below:

I used to be careful and drop in the exact amount but now I just dump like half the container in my topoff container because the water can only be saturated so much.

HighlandReefer
01/12/2009, 04:45 AM
Usually it is recommended that you start with 1 teaspoon of kalk per gallon of rodi for adding to your top-off. Kalk is saturated at around 2 teaspoons per gallon of rodi.

What Your Grandmother Never Told You About Lime
http://reefkeeping.com/issues/2005-01/rhf/index.htm

Randy Holmes-Farley
01/12/2009, 07:18 AM
one tablespoon per gallon will give you limewater. 14.0 Alk.

What does that mean? 14 in what units? In the limewater or the aquarium?

MrRyanT
01/12/2009, 09:44 PM
<a href=showthread.php?s=&postid=14136085#post14136085 target=_blank>Originally posted</a> by HighlandReefer
Usually it is recommended that you start with 1 teaspoon of kalk per gallon of rodi for adding to your top-off. Kalk is saturated at around 2 teaspoons per gallon of rodi.

What Your Grandmother Never Told You About Lime
http://reefkeeping.com/issues/2005-01/rhf/index.htm
Ok, I know its in one of those articles somewhere but for some reason I can't find it. I thought the saturation point was at 2 tablespoons not teaspoons. Can someone please verify? Thanks.

bertoni
01/12/2009, 11:54 PM
The saturation limit is 2 tsp per gallon. That can be increased by adding vinegar to the mix.

MrRyanT
01/13/2009, 05:27 PM
<a href=showthread.php?s=&postid=14143452#post14143452 target=_blank>Originally posted</a> by bertoni
The saturation limit is 2 tsp per gallon. That can be increased by adding vinegar to the mix.
Thank you.

Logzor
01/13/2009, 05:49 PM
If you have a large reservoir you can just dump a bunch in there and just add water when you need to. Eventually you will get this lazy! :rollface:

ricwilli
01/14/2009, 07:13 AM
How do you know when to dump more in the reservoir? Meaning, would I have to test the reservoir water often to see when it starts getting below 14 dkh?

Logzor
01/14/2009, 07:40 AM
I have no idea I just dump in a bunch every once in while. Thats a good question though.

I suppose if I notice my alk dipping I know it is not saturated. Considering how much I dump I I doubt I will ever have this problem. Mrs. Wages is cheap.

Randy Holmes-Farley
01/14/2009, 07:40 AM
Forget the 14 comment. I asked what he meant to give him a chance the clarify it, but it is incorrect in any normal usage of the words. :D

Most people add more solid lime each time they make new limewater, but if you have a lot of solids on the bottom, and want to try to reuse them, it is easy to monitor potency by conductivity.

This has a ton more info on limewater and its use:

What Your Grandmother Never Told You About Lime
http://reefkeeping.com/issues/2005-01/rhf/index.htm

Logzor
01/14/2009, 07:52 AM
How do I measure conductivity? One finger in the socket and the other in the limewater reservoir? :frog:

Randy Holmes-Farley
01/14/2009, 08:06 AM
A conductivity meter that can measure about 10 mS/cm will work, like the Pinpoint Salinity meter. You can also try to measure the calcium or alkalinity when the solution is clear and settled (saturated is about 80 ppm calcium or 40 meq/l (112 dKH) for alkalinity). pH can be used crudely.

ricwilli
01/14/2009, 09:05 AM
Randy, can you tell me how I can use my Pinpoint Salinity meter to measure the conductivity? What should I be looking for?

Randy Holmes-Farley
01/14/2009, 09:08 AM
Saturation is about 10.3 mS/cm, and potency is about linear with conductivity, so 5 mS/cm is about half saturated.

I show its use here:


The Degradation of Limewater in Air
http://www.reefkeeping.com/issues/2003-05/rhf/feature/index.php


from it:

Figure 1. The conductivity of limewater as a function of the time after the addition of
calcium oxide at 21 °C.

http://www.reefkeeping.com/issues/2003-05/rhf/feature/images/image002.gif

OwenInAZ
02/15/2009, 09:55 PM
Hey Randy, I think you need to increase the lower scale on your x axis :)

Also, if you add vineagar to your water to increase the saturation point, aren't you just back at square one?

Icefire
02/15/2009, 10:49 PM
Randy isn't a 1:20 ratio between Alk and Ca ?

like 40 MeQ/L and 800ppm Ca ?

Randy Holmes-Farley
02/16/2009, 08:23 AM
Hey Randy, I think you need to increase the lower scale on your x axis

You mean to see shorter times than 2 minutes? The point is it is fast. :)

Also, if you add vineagar to your water to increase the saturation point, aren't you just back at square one?

Square one??? I've not measured the see what conductivity you get at saturation with any given amount of vinegar, if that is what you mean, buy the method will work.

Randy isn't a 1:20 ratio between Alk and Ca ?

like 40 MeQ/L and 800ppm Ca ?

Yes. :)

OwenInAZ
02/16/2009, 09:17 AM
Randy -- I guess I mean that if you're lowering pH to get more Ca(OH)2 to go into solution, aren't you just taking up your hydroniums and raising the pH back up? It's been a while since I took formal chemistry classes, but I use the principles every day, and it seems to me that's sort of a backwards way of increasing the amount you can dissolve.

And for the graph, yeah I'd like to see the linear portion of the curve, even if it is fast :)

Randy Holmes-Farley
02/16/2009, 11:42 AM
and it seems to me that's sort of a backwards way of increasing the amount you can dissolve.

I still don't get the concern. You are taking some of the OH- and converting it to acetate. At saturation, the pH doesn't' change very much, but it is a tiny bit lower. Still probably 12.3+.

And for the graph, yeah I'd like to see the linear portion of the curve, even if it is fast

Sorry, I don't have a good way to mix uniformly that fast. As a practical matter, you couldn't stir limewater in a trash can for 10 seconds and stop, as it will continue swirling.

OwenInAZ
02/16/2009, 12:15 PM
Mostly I'm just being a geek with the graph, I understand the limitations of equipment :)

Won't there already be a lot of acetate around with the vineagar in solution already?

Randy Holmes-Farley
02/16/2009, 01:16 PM
There is not that much acetate in straight vinegar. Most of it is acetic acid. :)

OwenInAZ
02/16/2009, 01:32 PM
True, but it occurs to me that as it ionizes in water it will yield acetate. Maybe I'm wrong, OChem wasn't a ton of fun for me. Had to get through it to get to biochem, which is where the fun's at!

Icefire
02/16/2009, 02:44 PM
A conductivity meter that can measure about 10 mS/cm will work, like the Pinpoint Salinity meter. You can also try to measure the calcium or alkalinity when the solution is clear and settled (saturated is about 80 ppm calcium or 40 meq/l (112 dKH) for alkalinity). pH can be used crudely.

^^^^

I was just correcting your post ;)

Randy Holmes-Farley
02/16/2009, 03:37 PM
Yes, it should read 800 ppm. Sorry. :)