Disaster

Schrecken

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Hi guys I'm fairly new to this hobby about 6 months in.

For the past couple of months Ive been doing all the homework to DIY retrofit a sump onto my existing 55gal FOWLR tank. After receiving my plumbing, new pump and other assorted gizmos I went to work siliconing my glass baffles into my newly acquired 20L tank. I didn't put much research into specifically what kind of silicone I needed as long as It was 100% I did a quick google to make sure that GE 100% silicon II was OK and I saw someone say that they had built a ton of stuff using it and had no problems. After about a 12 hour cure. I made sure everything worked and did a leak test just to make sure everything was working fine. My return wasn't the right size so I decided to wait and not jury rig anything and promptly hooked my HOB filter back on and went to bed.

The next morning my GF text me that I had a dead fish this morning and that she had removed her. It was my very newly acquired dwarf angel. I did a parameter test and nothing was out of the ordinary. I chalked it up to her having been new and maybe all the hustle and bustle had just stressed her out too much. Yesterday I got some different plumbing and had the whole system running. Everybody was a happy camper. about 3 hours later I look over and my yellow tang is laying against a rock. Oh **** I thought. I get up to go check and see my goby floating.

It was getting late at night and I couldn't transplant anybody anywhere. I retested my water and my ammonia was still less at .25 ppm and everything else seemed fairly normal. Distraught I went to bed. The next morning my tang was dead along with my hawkfish. Only thing left were my 2 frostbite clowns. I took the sump out of the equation and did a massive water change and added a bag of carbon to the system. After doing my homework and realizing that my curing GE II silicone in the sump had charged the sumps water with ammonia and methanol. And had poisoned all my fish when I had turned the return pump back on. I could only hope that my two expensive clowns make it.

Well I wasn't so lucky and I only have 1 clown left.

Guys for the love of everything only use acid curing silicon and wait a few DAYS for everything to cure. Don't be like me. I guess the only good thing was that I didn't have any coral in the tank yet.

If anyone has any ideas on anything else I could do to keep my last clown alive please let me know.
 
If anyone has any ideas on anything else I could do to keep my last clown alive please let me know.

Put him a 5 gallon bucket with SW not taken from the DT. You'll need a small heater and air pump/air stone.

After doing my homework and realizing that my curing GE II silicone in the sump had charged the sumps water with ammonia and methanol.

I'm not understanding this, how the silicone caused ammonia and methanol to be present. o_O
 
I'm not understanding this, how the silicone caused ammonia and methanol to be present. o_O

When silicone that is neutral cure, cures it produces ammonia and methanol
When acid cure cures it creates acetic acid "vinegar"

Put him a 5 gallon bucket with SW not taken from the DT. You'll need a small heater and air pump/air stone.
I used all my water doing the water change Ill have to get some tomorrow if he makes it. Fark :(
 
When silicone that is neutral cure, cures it produces ammonia and methanol
When acid cure cures it creates acetic acid "vinegar"

Ahh I did not know that.

I used all my water doing the water change Ill have to get some tomorrow if he makes it. Fark :(
You can dose Amquel or Prime to neutralize the ammonia. But I'm not sure what to do about methanol in the water.
 
When silicone that is neutral cure, cures it produces ammonia and methanol
When acid cure cures it creates acetic acid "vinegar"


I used all my water doing the water change Ill have to get some tomorrow if he makes it. Fark :(

Tap use bloody tap..... mix it with salt and a chlorine remover . NO it's not ideal
But I dont think you have till tomorrow at this point.
 
On second thought, dosing an ammonia reducer with a "alcohol" could trigger a bacterial bloom. Which would starve O2 out of the water.

You don't have a "reef buddy" nearby who can help you out? Put the clownfish in one of his/her tanks.
 
Tap use bloody tap..... mix it with salt and a chlorine remover . NO it's not ideal
But I dont think you have till tomorrow at this point.

^^I agree. Use Prime or Amquel, and let the salt mix an hour or two.
 
Done. I looked and had 3ish gallons of RODI salt that hes in now

Good ....that will keep him....for tonight and with more water/air for longer... got to fix your tank now.
Im not ever sure exactly whats wrong...so lets back up.

Did you add a new sump to an established tank? such can cause a recycle is why I am asking.

and breath....we have all messed up... let find the issue and focus on fixing.
 
Well He didn't make it either. Total loss except for the inverts

I'm going to tear down the sump and redo it with the correct silicon just in case. Then recycle the tank to get ammonia back to zero then tester fish to make sure that the methanol is gone.
 
Well He didn't make it either. Total loss except for the inverts

I'm going to tear down the sump and redo it with the correct silicon just in case. Then recycle the tank to get ammonia back to zero then tester fish to make sure that the methanol is gone.
Sorry to hear this! Good luck!
 
Hold on a sec. What silicone did you use? GE 1 or GE 2?

GE 2 had the mold inhibitor in it and is the wrong one for our tanks/sumps. You want the GE 1.

All things aside, sorry for your losses.
 
Hold on a sec. What silicone did you use? GE 1 or GE 2?

GE 2 had the mold inhibitor in it and is the wrong one for our tanks/sumps. You want the GE 1.

All things aside, sorry for your losses.
Some people say it does some people say it doesn't. There isn't a reason to put a mold inhibitor in silicon and there isn't anything in the msds to suggest that such a component exists. Doesn't matter if it does or doesn't but ge2 is potentially toxic while it cures because of ammonia and methanol while ge1 just makes vinegar. I'm not taking any risks.
 
I used GE1 for my sump but I didn't use the sump for a few weeks after I made it.
 
Thank you for the informative post. I have been want to build my next tank and I will use caution when selecting the silicone and cure times.
 
Made same mistake with GE II for sump. I called GE to ask what is inhibitor, they would not say... Said, get every thing out! I said, okay, then tell me how to mitigate the "inhibitor", they would not... If it kills mold, it's bad for anything alive in tank.... I had to take sump out of system, remove all silicone used... Changed all water in my 180g system over a 10 day period ... I could not believe I made that mistake after being in hobby for 15 years! All fish survived, but crustaceans did not... Corals took few months to come back... Tube said, 100% silicone. In tiny fine print on back of tube, referred to inhibitor... OUCH....

Good luck with reboot....
 

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