Continuous water change questions

[Toddah]

40 Gallon Cube
20 gallon remote Sump
Skimmer producing great skimate
Mixed reef
Lots of snails mixed group
2 clowns
2 Euphyllia, ricordea a group of about 10, zoes on the sandbed island

I have a 4 year old mixed tank that I have been doing water changes using a dual diaphragm pump but not as a continuous water change.
I recently acquired a DOS pump for my Apex system and now I have very granular control of the volumes that are being exchanged.
I am currently changing 32.7mL around every 15 minutes so around 30 gallons a month (I think) of the approximately 50 gallon capacity.
I am looking for a good balance between healthy water quality and economy of salt costs.
I also have a 4 head dosing pump for dosing additives of what ever I need.
I am going to just run the DOS for a few weeks to let it reach a new equilibrium and see where things end up.
I was dosing Vinegar for a few months and in anticipation of the CWC I have been reducing that dose until I am now off it completely.

I am looking for any advice you can contribute as to anything I should watch out for or if I should be doing less volume on the DOS or more interval in between the cycles of water change.

Thank you in advance for your attention.

 

[Randy Holmes-Farley]

I change 1% daily, which is a lot less than you are changing. Nothing typically wrong with changing as much as you do, except cost, as you note.

 

[jonelder68]

I follow Randy and do 1% daily with a DOS QD. As far as the DOS goes I recommend reversing the counter clockwise rotation for the right side/removal head. It makes priming and calibration a real pain. Just run it clockwise same as Left side. You’ll have to change it after setting up default AWC.

I then just check salinity weekly while doing nutrient checks. Confirms everything is working/calibrated fine. Recalibrate DOS every couple months (2-3). So far hasn’t drifted out of calibration and working great!

 

[UmphreakMcGee]

I follow Randy and do 1% daily with a DOS QD. As far as the DOS goes I recommend reversing the counter clockwise rotation for the right side/removal head. It makes priming and calibration a real pain. Just run it clockwise same as Left side. You’ll have to change it after setting up default AWC.

I then just check salinity weekly while doing nutrient checks. Confirms everything is working/calibrated fine. Recalibrate DOS every couple months (2-3). So far hasn’t drifted out of calibration and working great!

Can you go into more info on running clockwise? I’m about to set mine up.

 

[jonelder68]

Finally got a DOS for AWC’s! Any tips or hints appreciated!

Well after a long wait, DOS has arrived at my house! I’m reading through the directions and things seem pretty straightforward, but R2R members always seem to know tips that aren’t in the directions. I have a 40g breeder with a 20g sump. I have an Apex Jr with room for the module and a surge...

www.reef2reef.com

All in this post and better written than I can do . If have anymore questions after let me know.