(1) Don't usually quarantine. I am Setting up Q-tank for an expensive fish I have incoming though.
(2) Bad housekeeping, don't keep after detritus in display or sump
(3) Clean skimmer body every couple weeks at best.
(4) Test every couple of months, except salinity and pH
(5) Don't look at tank every day when busy
(6) Kill Korals Kause of Karelessness (Let stuff fall on other stuff, etc)
(7) Don't use GFI outlets (nothing in display tank runs on 110VAC anyway)
10 years with reefs. Five years before that with SW fish only. Had my First SW tank in 1975.
(2) Bad housekeeping, don't keep after detritus in display or sump
(3) Clean skimmer body every couple weeks at best.
(4) Test every couple of months, except salinity and pH
(5) Don't look at tank every day when busy
(6) Kill Korals Kause of Karelessness (Let stuff fall on other stuff, etc)
(7) Don't use GFI outlets (nothing in display tank runs on 110VAC anyway)
10 years with reefs. Five years before that with SW fish only. Had my First SW tank in 1975.