Jestersix

For those that dose Alk

Krak256

Supporting Member
For those of you that dose alkalinity, which product do you use? I've been using BRS' soda ash but am a bit concerned about precipitation. Do others here use sodium bicarbonate instead?

Right now I dose into the return section of my sump; when I dose Alk, I do notice that a bit of it settles at the bottom of the sump. It does seem to disappear eventually.

In order to maintain a 7 dkh, I am dosing ~45ml a day on my 150g which consists of mostly frags. Is that a lot or normal? When I set up this tank, I used Reef Crystals which usually as a ~11 dkh; after a month of not doing water changes, I was surprised to find my dkh fell to ~5.5.

Here is a pic for reference:
IMG_1888.jpg
 

CaseyP

Supporting Member
I dose into my return pump section which isn't turbulent enough. I used to get buildup in that chamber until I added a small powerhead pushing flow directly where the additives drip in. No more precipitation after that and was able to adjust the ml needed down.
 

Krak256

Supporting Member
45ml a day sounds normal. I would move your dosing line to the first chamber of your sump where the tank water first enters because of the water movement will be faster and help with the precipitation
Hey John, this is the sump I have. I'm not sure I can pipe my dosing tube into the first chamber and I think by the time the water moves into the skimmer section, it may already be too slow?
1624914239082.png
 

Krak256

Supporting Member
I dose into my return pump section which isn't turbulent enough. I used to get buildup in that chamber until I added a small powerhead pushing flow directly where the additives drip in. No more precipitation after that and was able to adjust the ml needed down.
Thanks, I may have to add a small powerhead as well.
 

Krak256

Supporting Member
45 ml/day isn’t much for that size tank but ultimately depends on alk demand of your tank. Do you dose once per 24 hours or many times per day. If possible the latter.
I split it up by a couple of hours. First dose is 25ml at 3pm and the second is 20ml at 7pm
 

jhuynh

Supporting Member
u can keep it same spot and can dose smaller amounts every hour - more during peak time cause that's when alk will be consumed more. I used to dose about 720ml kalk and split it up in a 24hour period. 120ml alk during lights are on 10hours. cal I dont remember but almost equal parts.
 

MolaMola

Supporting Member
Good reminder for me to try adding powerhead in sump. Thought Apex dosing Ca and Alk opposite times of day/night into tiny section where skimmer water exits would be enough flow to prevent precipitation. Uh, I was very wrong. (dosing tubes were positioned directly in front of that white area.)
IMG_0974.JPG

Not sure if I should try in drain chamber where white drain pipes are plus big skimmer not shown in pic, or in return. However, I have some LR in the return chamber plus I don't want to seize up return pump.
 

Vhuang168

Supporting Member
Good reminder for me to try adding powerhead in sump. Thought Apex dosing Ca and Alk opposite times of day/night into tiny section where skimmer water exits would be enough flow to prevent precipitation. Uh, I was very wrong. (dosing tubes were positioned directly in front of that white area.)
View attachment 29171
Not sure if I should try in drain chamber where white drain pipes are plus big skimmer not shown in pic, or in return. However, I have some LR in the return chamber plus I don't want to seize up return pump.
Dose into the return chamber. I put my lines right into the last baffle before the return chamber.
 

MolaMola

Supporting Member
Dose into the return chamber. I put my lines right into the last baffle before the return chamber.
That's just where mine were dripping. Maybe my baffle area is too small or I need to get further away from the acrylic and over open water. I need to set it up and try again. Thanks.
 

NanoCrazed

Supporting Member
Lol. I'm lazy and cheap. I dose A&H super washing soda.

I drip right at the edge of my middle chamber before it runs into the return section. Max turbulence and better mixing.
 
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