sh*tty job.

Regarding the use of acids to dissolve calcium carbonate in the tank,  I did buy some muriatic acid and tried using that (diluted to 4%) to clean my tanks.   After some experimenting I’m not confident that it would have removed a significant amount of the “rock” in my tank.   I collected some of the chunks of rock that were dislodged by the pressure washer and tried soaking them in the muriatic acid.   There was a lot of impressive effervescence but even after a day of bubbling away, the rock wasn’t reduced in size very much.   I think it may help “soften up the defences” a little but in my case I think mechanical removal was the way to go.   I shopped for other chemical solutions too but none were available in Canada so I haven’t tied them.  Just sharing my experiences here, in case anyone has the same situation as mine.  Maybe it’s just the North Pacific seawater, or maybe the Canadian urine…