Auto doser.... SPS now dying

[gregzz4]

Take this for what it is ... an attempt from a newb to help

I just re-read this thread and I don't see mentioned what you are dosing
What products are you using ?

Did you test before you started dosing ?

Again, I'll say a second opinion on the pH test would be good and if your KH is really that low, I'd go with either dc4's suggestion of using Reef Builder to get your Alk back up, or bump up your Alk dosing, until it's higher
Either way, do it over a day or 2 so you don't create anymore shock and also Calcium precipitation
This should get your pH back inline

[Sunee]

I note you have given the times that you are dosing but have you ever checked the volume that is actually being delivered per dose? Even precision dosers can vary, I would check this to make sure. With your system you may have to alter the time of dosing for each product to make sure it is delivering exactly what you want.

I worked with a computer controlled nutrient delivery system for my Masters and had to check delivery of each channel before every experiment (180 channels) and input into the computer to ensure even dosing across the system.

Anyway I hope you figure it out.

[paddyob]

Steve St RCE tested my ph.... 8.2. So my test is pooches.

Going with the theory that my bulk dosing was adding more and although testing at 100 alk... The consistent 100 is lower with my doser than when dumping large single doses.

Make sense? Back to upping my alk manually.

[Ryan-b]

I would try and dial in the doser, may take a couple days or weeks, but once you have it you wont be disappointed.

Adding any chemical in large doses, at one time, is asking for trouble IMO.