Either – the oceans are getting warmer & the CO2 concentration in seawater is decreasing (due to outgassing).
Which means that ocean acidification from man-made CO2 in the atmosphere is nonsense.
Or – the oceans are getting cooler and the man-made CO2 from the atmosphere is dissolving in those cooler oceans and causing – insignificant – ocean acidification.
Which means that warming oceans and the associated sea level rises are nonsense.
Take your pick – because REAL SCIENCE states you can’t have both.