Tank is crashing :(

[vanreefer]

Was using the same things at full ( recommended) doses... Had a similar issue which resulted in the loss of all my sps... i think the corals got stressed and stopped using all the micro elements which then built up to toxic levels. Tank is recovering now... I think I will start at 10% of recommended doses...
I would encourage u to do as large a water change as is possible... I did 4 50g changes... Water volume is ~220g