If chlorine is not present in the water being used to perform the water change then it isn't nessassary - IF chlorine is present, not using a de-chlorinator is extremely irresponsible fish keeping. Personally I de-chlorinate before and after to ensure minamal expossure.
Who uses dechlorinaetor during WCs
- Thread starter Aquanero
- Start date
So, double dose, then? Prime's instructions do say that is acceptable to a degree. And I'm pretty sure I end up dosing about 1.5 or 1.3 times what I need to anyway. Using that hose makes me nervous.
i use prime all the time. my fish stay healthy so i wont stop
Posted on mobile.monsterfishkeepers.com
Posted on mobile.monsterfishkeepers.com
Last Sunday I did a water change on my 265g. I was filling it back up and forgot to put Prime in. I lost two 6 year old filament barbs before it was full. 
Oscars;4074886; said:
balton777;4078062; said:Last Sunday I did a water change on my 265g. I was filling it back up and forgot to put Prime in. I lost two 6 year old filament barbs before it was full.
Two good posts with solid info!
With small changes and just chlorinated water (not chloraminated), dechlor is often not needed. Heavy aeration is often enough to eliminate low levels of chlor. Personally, I don't suggest anyone take any chances because most people don't know the level of chlorination their water has (and it can change without notice).
I make huge water changes, and I have chloramine to deal with, so I use Prime every time.
The key bit of knowledge is knowing what your water has in it and at what levels. That factored against the water change % gives you your answer.......but no need to stress out your fish (or kill them) just to save a few pennies!
I make sure to add prime every time, even if its only a 10% change. I know in some water districts (like mine in northeast Atlanta), the amount of chlorine they add varies. Sometimes you can SMELL the chlorine in the water, sometimes the water seems fine, but given that it varies, just because you get lucky once doesn't mean the next time it won't kill your tank. Seems too big a risk to me to NOT make sure to add it every time, it's not that much more effort or expense, and it's one of those "a stitch in time saves nine" things... I'd rather have to constantly remind myself to add something to my water when I change it than to clean up dead fish.
Bingo!
Like Chris I do massive water changes, and have chloramine treated tap water, so sans a water conditioner my fish wouldn't survive more than a few hrs. Our water remains stable year round @ 2mg/l chloramine, and using Seachem Safe I can treat 400,000 gallons with one of their 4kg containers. (cost approx $75)
Oscars;4074886; said:
?!?! You're implying that 10~20% from a 100g tank is different from 10~20% from a 10g tank?
Ratio matters more than volume.
