View Full Version : Dowflake Xtra and Randy's 2-Part

03-30-2014, 09:37 PM
The original formula from Randy is to use 500grams/Gallon of Dow Flake, which is/was 77-80% pure Calcium Chloride
The new stuff is Dowflake Xtra and is 83-87% pure

Because of it's higher concentration, it's been recommended to use 8% less of the Xtra version, so 460grams/Gallon

If you're using the new Xtra version, how much are you mixing ?

03-31-2014, 12:00 AM
I actually mix a slightly higher concentration for both cal and alk so I don't have to dose as much. Just make sure the two are balanced.

03-31-2014, 12:17 AM
So you use Dowflake Xtra ?

03-31-2014, 01:08 AM
Where can you buy dow flake?

03-31-2014, 01:49 AM
So you use Dowflake Xtra ?

I use a different brand pellet that is 93 to 97% so by weight its even more concentrated.

03-31-2014, 03:36 AM
I use a different brand pellet that is 93 to 97% so by weight its even more concentrated.
Obviously you're having no issues then

03-31-2014, 03:37 AM
Where can you buy dow flake?
I ordered a 20KG bag through my local Home Hardware

03-31-2014, 05:12 AM
The stuff I got was through acklands granger. I've been using it for over a year and have dosed over 50 lbs in that time.

03-31-2014, 06:35 AM
Anyone know where I can get dowflake in edmonton?

03-31-2014, 01:55 PM
Where can you buy dow flake?

I have some if you want.

03-31-2014, 02:26 PM
Anyone else using the Xtra stuff ?

Any issues in keeping Alk and Ca balanced with the higher purity ?

03-31-2014, 05:48 PM
Hey gregg.
Not sure why you would anticipate balance issues. If the new ca is of higher concentration you will just add less.

I have switched between various supplements a few times. I would just start the new dose roughly where you had the old one . Then check your parameters each day for a week and make adjustments accordingly.

Unless your trying to calculate it out so that you dose Equal portions of the liquid. Then why does it matter .

I understand as per randys recipe it was all fairly equal but at the end of the day if you are mainting your levels (9 alk ,420ca) or whatever you choose . Then dossing 100ml of alk and 60ml of calcium etc shiildnt matter.

At least not to me lol

03-31-2014, 08:01 PM
Thanks for that
I was kinda hopin' to keep the timers matched
Just a bit anal :wink:

03-31-2014, 08:06 PM
Didnt realize You were using timers etc. That likely makes it a bit more of a hassle to make adjustments frequently.

03-31-2014, 10:46 PM
Reefkeeper timers
Not so difficult to change

04-01-2014, 02:53 AM
If you want to keep the volumes you dose alk and cal the same you can increase the concentration of your alk solution by the same amount.

04-01-2014, 02:21 PM
Thanks for the suggestion
I'll stick with timer changes to start
I'm hoping once I find the initial balance I'll be able to base Mag dosing off the amount of Alk used
This way, in the future, I won't have to test weekly anymore

04-01-2014, 05:03 PM
maybe a post in the Chem forum on RC, probably get a response from Randy himself.

04-17-2014, 05:19 PM
Hey Abe, just checked HomeHardware and they do have 34 bags in Airdrie and $24.99 20kg each. Maybe available in your area too.

04-17-2014, 11:43 PM
Thanks I will check this weekend.