Alk swing

[ReefinItReal88]

Can anyone shed some light on an issue I'm having.

So I setup a new frag tank. Used 50% of established water from my old tank + 50% fresh saltwater. Everything was good.

Was good and stable from day 1-5

Day 5 my params looked good so I added my corals back in.

Params for that day were as followed:

1.022, pH 8.2, dKH 9.7-10, calcium 500

Next day parameters:

1.023, pH 8.2, dKH 11.5-12, calcium 480

I test all my parameters with Hanna Instruments

Any ideas on what the heck happened here?

Got co2 bubbles also, and a bit of brown algae but I scraped it.

Im not sure if a nitrogen cycle was triggered? Last time I did a tank turnover, this didn't happen.

The coral inside don't seem too stressed (mostly acropora and LPS, few zoas). Nor the single fish inside. No apparent necrosis on the acropora. Some have polyp extension and others don't.

Thanks for the support.

 

[ScottR]

Can anyone shed some light on an issue I'm having.

So I setup a new frag tank. Used 50% of established water from my old tank + 50% fresh saltwater. Everything was good.

Was good and stable from day 1-5

Day 5 my params looked good so I added my corals back in.

Params for that day were as followed:

1.022, pH 8.2, dKH 9.7-10, calcium 500

Next day parameters:

1.023, pH 8.2, dKH 11.5-12, calcium 480

I test all my parameters with Hanna Instruments

Any ideas on what the heck happened here?

Got co2 bubbles also, and a bit of brown algae but I scraped it.

Im not sure if a nitrogen cycle was triggered? Last time I did a tank turnover, this didn't happen.

The coral inside don't seem too stressed (mostly acropora and LPS, few zoas). Nor the single fish inside. No apparent necrosis on the acropora. Some have polyp extension and others don't.

Thanks for the support.

Are you dosing? Dosing always throws my params off. Ca, Mg and Alk always interact with each other. Also, another reason could be a different brand of salt - although I’m sure that’s not the issue.

 

[ReefinItReal88]

Not at the moment I'm not. No

 

[Mastiffsrule]

I would think maybe a glitch with the checker.

I would test a few more days to rule out the obvious, and if not resolved move onto the not so obvious.