Reef expoxy disaster

[gbeef]

Ive already done a 5Gal water change on a 14Gal yesterday im thinking about doing another major change today when i get home probly another 5GAL... Is this alright to do? or would i risk crashing the system with a sudden removal of 10GAL or 80% of the water in less in than 24hrs?

[Whatigot]

play it safe...
do for example 5 2 gallon water changes over the course of 10 hours rather than one big one all at once.