Just wanted to share after haing a Neptune dos awc system setup for a few months that I believe the auto program feature severely limits the efficiency of the process.
Here is the problem. The system limits how much the dos can be used in a streight shot and breaks the "doses" up multiple times. Furthermore it adds and removes them at the same time.
So as a example I do a 2 gal awc on my 100gal tank every day now. Well that sounds like a strong amount as it equates to 14% a week or 60%+ a month. Half that should be enough to knock all nitrates,phosphate and undesirables in check..So why? I didn't start out here but it's what i needed to achieve the results i wanted.
So in reality what is happening. the dos takes 859ml in/out at the same time...then it pauses letting the old SW mix with the new SW...then it does another 859, and so on and so forth. This doesn't sound so bad but the math behind dilution makes this horible.
It would be much more efficient if the dos heads didn't break up the doses or if they did drain the old first and then put in the fresh after.
Because of this i am going to manual write the codes for the dos (and swap the lines as the one runs in reverse) to where I take out water first, then put water back in and at the same time have my ATO turned off for this duration. I highly suggest anyone running the default awc system programming do the same.
I also believe this effects anyone doing a larger "manual water change" using their programing.
Does anyone have any thoughts on this subject?
