Father of 9 (soon to be 10) with 320 gallon system

Big Smelly fish

If it ain't broke, fix it till it is.
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Fish Think Pink

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I posted previously as having a 90 gallon tank, with plans to move into a 180 gallon tank. 2 years ago there was an ice storm here in Oregon and my 90 gallon tank crashed.
I now have a 180 gallon tank with a 50 gallon (ish) sump, and a 90 gallon (my old tank) refugium.
I have 4 chromis and 4 firefish in the 180 who are doing fine. I tried to add some snails, hermit crabs, and emerald crabs. They all died. The crabs lasted a little longer than the snails, but everything died pretty quickly. The LFS owner I got them from talked about the possibility of heavy metals in the water. What's the best way to check for that? If that is the case, the only possible sources I can think of are a chunk of concrete in the water or the pump I use to transport water to the system from my salt water mixing system, which dies have rust on the bleeder plug. Should I eliminate one or both things right away, or test first? My best guess is the fish will be okay for now, and that every crustacean in my rock is already dead. Testing shows no ammonia, no nitrates, and 10 ppm of nitrate. I do have brown algae starting. I thought I knew what I was doing, since I was following the pattern that worked very well when starting my 90 gallon tank, but I guess still have much to learn.

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Welcome! Glad you joined. Sorry for your losses. You have lots of BBA - Bounce Back Ability - that is great for this hobby as well as great life skill!

Have you considered starting your build thread? I found its a great place to document my tank's evolution for myself. I started tank first then joined, so I'm still finding myself going back collecting pictures & updating historically as well as current state. Once you create your first post in your thread and link it to your account, they will give you build badge (look left, under my ID)

This might help you find people local to you:

This is a good reference book type online article I still review:
 

tbrown

Nominated Cronie Intern - Might be failing?
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It sure is. Do you think the concrete is the probable source. There were some brown mounds on it that I thought were diatomaceous but could have been corrosion sprouting from metals in the concrete.
Was the rock used? If it was from a QT it could have been treated with copper and soaked it up.
 

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