Extreme tank crash. Thinking of restarting

BRS

Andreas' Reef

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Over the span of a week all of my corals died. And 1 fish. I’ve tested everything and still don’t know what happened. But I think I kinda “sterilized” my tank. My water changes were 50-60 percent on my 10 g nano. It was my mistake. I’m gonna work on doing smaller water changes. I’m gonna do a rescape and get new corals too. Luckily one colony of zoas lived. I’ll post pictures on the thread tomorrow.
 
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blaxsun

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Nano tanks can be challenging as it’s very easy to unbalance things in very short order, which then has a tendency to quickly stress things out. I might suggest sticking to 10% max every 2 weeks the next go around (after you get things balanced again or restart with a fresh cycle).
 

Tamberav

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Water change percentage shouldn’t matter unless you didn’t match salinity and temp close.

People do 100 water changes on picos all the time. I would change everything but an inch of water in my 5g.

I just changed 90 percent in my 25g.

Both tanks are a mix of corals including SPS and they don’t care.

I don’t know what you mean by sterilize a tank. Bacteria will be on the rock and sand. Low nutrients would not effect a fish if you mean that.

Probably another cause unless temps are salinity were off a good amount.
 
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