A horrible idea. Don't try this at home, kids. At 1000 calcium -- which strongly doubt is accurate because it would be precipating out -- Alk is abysmally low. So corals can't grow and you slowly killing your fish with too high calcium.I have a friend who hates coraline and keeps his calcuim at 1000 to prevent it's growth, just sayin there's more than one way to get rid of it.