So not so high, but on the higher end nonetheless.

Out of curiosity, do you have precipitate forming anywhere in your tank? Or was it just that the dosing solutions would precipitate when added to the tank?

Yes there is calcification in part of the sb. No visible precip of the solutions though.. Do you think switching to the sodium bicarbonate is really the answer? & if so why?

Just wondering, how stable is your Mg?

A combination of high pH, Ca and Alk causes even higher supersaturation of Ca and Co3 in the water making it more likely to precipitate. Mg interferes with the process, so keeping a high Mg can assist in staving off precipitation.

The change in Alk buffers I'm suggesting is for two reasons: 1, to lessen the impact on your salinity (by adding half the sodium during dosing), and 2, to lower your pH.

Also, see what boosting your Mg to 1400 - 1500 does for you. Might be just as frustrating getting Mg up (and to stay up!), but it'll help keep your CaCO3 from precipitating.

hmm.. personaly none cuz I don't know anyone who doses there tanks, but I suspect quite a few would have had to if we dosed.

my old tank (90 gal) had a Ca reactor which was sized for a 500 gal tank, running full out, plus I used a kalk reactor for my make up water. go back 10 years ago when people did two part by hand, there were always problems with the precip. Randys two part was a new thing back then and lots of people were having problems with getting the stuff to make it up here with out it having a bunch of garbage in it.

Steve

I just caught my doser dosing alk 1st & then under a min later dosing ca.... it's set on the auto dosing schedule. I have no idea how to set it manually. I've never seen this happen before. WTF

Hmm..that's not good. I think it's time to email Profilux for some help. :)

The ONLY way the doser will do this is if you have managed to get water onto the inner front board where the manual overide button connection ribbon cable sits.

easy to see - take the lid off, pop out the front board and you will see corrosion from salt water incursion. We had one last week, the client said the unit was above the fish tank, when we got it here you could have kept fish in the lower half of the unit :( It had clearly gone swimming, not saying yours is that catastophic but the issue was the same.

This is the kind of damage you see with water being allowed to get into electrical devices

http://i71.photobucket.com/albums/i1...t/IMG_7689.jpg

http://i71.photobucket.com/albums/i1...t/IMG_7688.jpg

I cant offer support here so please email me at sales@aqua-digital.com with the outcome either way.

Parts are available for self replacement if you have damaged it.

Try dosing less frequently, but more at each time to get around this double dosing that's going on.

BTW, I'm dosing over 2 ml/gallon of Ca and Alk. I think 3 ml of Mg/gal too :p

Micheal here are the pics of it. Incase they didn't come through on the email. FYI for anyone who has this it was super easy to take apart. The longest part was putting the pics to email/ canreef.:)
http://i971.photobucket.com/albums/a...6/IMG_0315.jpg

http://i971.photobucket.com/albums/a...6/IMG_0314.jpg

http://i971.photobucket.com/albums/a...6/IMG_0313.jpg

http://i971.photobucket.com/albums/a...6/IMG_0312.jpg

http://i971.photobucket.com/albums/a...6/IMG_0311.jpg

http://i971.photobucket.com/albums/a...6/IMG_0310.jpg

This does not show what we asked sorry, we need to see photos as posted here by us showing the underside of the ribbon cable connection and the front panel removed.

I can not offer support here, please contact me directly.

Here are pics of the front board removed & of the underside of the ribbon cable. I do not have tools small enough to remove the ribbon cable from the front, & therefor cannot take a pic. of the inside of the pinhole. However at this point i would say it is crystal clear there has never been a drop of moisture inside of this unit. Sorry I'm having now luck attaching photos to the email.


http://i971.photobucket.com/albums/a...6/IMG_0323.jpg

http://i971.photobucket.com/albums/a...6/IMG_0322.jpg

http://i971.photobucket.com/albums/a...6/IMG_0316.jpg

http://i971.photobucket.com/albums/a...6/IMG_0319.jpg

http://i971.photobucket.com/albums/a...6/IMG_0317.jpg

Other than pump wear due to no servicing as discussed by email then I doubt the unit is at fault, they are pretty bullet proof :)

I have given some suggestions by email, please go through these to rule out unit issue, but as said above other than lack of servicing which can lead to the unit dosing less than dialled in, i dont see any issues, but I will continue to support you via email.

One last thing, pump calibration is important - make sure you have calibrated the unit recently as per instruction manual.

Thx. Micheal I think the unit is fine as well. I just feel the random dosing on the auto setting doses inappropriately close to one another. I'm not saying that this is causing the precip, but could likely play a part. Like said it is probably a shitty batch of chems.

Hi

the close dosing would not effect the chemical imbalance, the GHL is used by well over 1,000 users now in North America.

I would suggest two things

Use manual mode as per the instruction manual I sent then you have full control over when it doses, if you want help setting this up just call me.

But you have hit the nail on the head really, bad chamicals "cheap chemicals" are cheap for a reason. I do not know what you are using but we have seen some bad stuff out there of late, more so in the "DIY" home brew catagory or stuff that is supplied from that process :( calcium for salt clearance is NOT reef safe.

I will reply to your email also.