Fish tanks are kept at low salinity because it is more likely that fish won't develop disease because many parasites can't tolerate low salinities. They also do it to save on salt (in my opinion). However, corals do not tolerate lower salinities. I would keep it no lower than 1.023 or 1.022 if you're really that interested in lowering the salinity. There is nothing wrong with 1.025

Yes use prime (careful with that stuff, never overdose) and match the salinity and temperature to the water in your tank and do a water change.

everyone says overdose and prime can hurt
what is wrong with that stuff?

what does it do? what can overdose do

I have no idea but it melted some mushrooms and leathers quite nicely. Hmm much like your situation. Hows your prime dosing been lately??

hmmmm. i also have crushed coral on the bottom of the tank..

should i get rid of this and use sand?.

nah crushed coral is fine. not ideal but if you want to leave it its not a big deal

just the crushed coral is getting green and dirty.

yeah thats usually why people don't use it. it collects a lot of detritus. you could replace it with sand if you wanted, or use a siphon hose on it to suck up the crud in between and mix it up a little to get to the white sides of the rubble :biggrin:

ah what a learning experience... my wife pured prime in the tank like it was gold.

yep that would do it. I'd recommend doing a minimum 25% water change to start with, do this this week and next. And take that bottle away from her, there are instructions on the back for dosing. Stick to them or reefing for you is going to be sad and expensive.

What is 'prime' by the way?