Join Date: Jul 2017
Location: North-ish Southern California
Ammonia in tap
Hi everyone, I am a bit confused as to what is going on and am trying to get some help/opinions.
I have a 10 gallon tank that I newly set up that I've planted and put shrimp in. I have been dosing seachem stability every day to kickstart the cycle. All of my shrimp have been fine and doing great until today..when I did a 25% water change. One of my crs has been twitching, laying on its side so I thought the water change stressed out my shrimp. I know crs are known to be very sensitive to water parameters so I figured it was just that one shrimp. A while later I see one of my yellow shrimp dead, so I start panicking. I tested the water for ammonia and it read .50 ppm! I quickly moved my shrimp over to the 20 gallon tank that has been running for a while. I tested my 20 gal's ammonia and it read 0. I initially thought the ammonia has been building up in the small tank as it's not fully cycled but when I tested my tap it read a whopping 1.0-2.0 ppm!!
Here is the most confusing part... I dose my 20 gallon pretty heavily so I do weekly 50% water changes. I always dose prime in the bucket or the tank itself before I put the water in, as I did for the 10 gallon. Last week, I did a 50% water change on the 20 gal. None of my fish showed signs of stress or died. I definitely did dose enough prime for this water change, as I usually do. Not to mention the 10 gallon was filled from the start with tap with prime dosed. In short, I did nothing different, yet I lost two shrimp!! I am too afraid to do a water change on my big tank now..
Obviously from now on I will be carefully monitoring ammonia levels in the 10 gallon, and using RO/DI water temporarily, but I am questioning whether my tap had these ammonia levels all along.. I didn't think to test my tap for ammonia as I didn't observe any spikes in my cycled tanks after a water change. What do you guys think?