Switched from prime to safe- dead fish

  • We are currently upgrading MFK. thanks! -neo
RD. said:
Generally they will post a low-high scale, some municipalities vary a lot, so if 3.7 is the high then a bit over in dosage of Safe, or under, shouldn't be causing any issues in a mature tank. If it did the majority of aquarium fish in America would probably be dead. lol I suspect most people just toss a pinch of powder (or liquid) in and call it good, without even knowing what their actual chlorine/chloramine level is throughout the year.

Having said that, in a heavily stocked tank, with warmer temps, and constant borderline 02 levels, an overdose could easily tip the scales for some fish. Or, yes, it could also be something else that took place with your tap water, such as a local repair that caused levels to fluctuate, or that even allowed a burst of contaminants to briefly enter your supply line. Hard to say what happened. My experience is that Safe is just as safe as Prime, and I have used both products in many tanks over many years. Even with uber sensitive fish, including eggs, larvae, and fry, and massive water changes, never an issue - which is why to this day I still use and endorse the Seachem line of water conditioners.
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Ok. So I'm thinking dose was fine. Waiting to hear about any repairs. But if it's not my tap water what could cause something like this to all 3 tanks. Remember the water turned slightly cloudy overnight after the water change. I have a large air stone in my 180 gallon and plenty of surface movement so i don't think O2 is an issue. Temp is average at 79, spikes to 80 and drops to 76 when it's cold out. I test and do water changes regularly and haven't had any issues. Tank was going through partial cycle due to moving it but all the bio media was kept. Been doing water changes 1-2 times a week for last 45 days.
 
I use safe and just put a level teaspoon for my 700 and never ever had any issues
 
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Partial cycle + cloudy water = ammonia spike. That would be my best guess at this point, and an ammonia spike can certainly kill fish.
 
did not know about the water cloudy part. and I agree with RD.
 
do anything to flub your cycle? wash filters media in untreated tap water? forget to dose tank, fill and then say oh crap I forgot to dose? anything?
 
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pops said:
do anything to flub your cycle? wash filters media in untreated tap water? forget to dose tank, fill and then say oh crap I forgot to dose? anything?
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No. Didn't touch the bio media. Strictly just a water change. Dosed within minutes of starting to refill. I have been doing this for over 10 years. So fricken weird. And sad, i lost 2 fish i really like.
 
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