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Discussion Starter · #1 ·
I have a 75 gallon aquarium stocked with 1 venustus hap, 2 red zebras, and 1 strawberry peacock, so plenty of room for them. I run a Fluval FX4 and a sponge filter, also 1.5 cups of zeolite blend and change 50% water once weekly and condition new water with Prime. Despite this, I can NEVER for the life of me get the ammonia to read below 0.25ppm. Is this just a ghost reading? I've heard in some places that 0.25 can be equal to unreadable. Is there anything else I can do to lower the ammonia? The only other idea I have is more frequent/larger water changes but I don't have time or resources for that
 

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Discussion Starter · #2 ·
Should also note this aquarium has been established for almost 2 years. And yes I am experiencing fish illness and death which I believe to be related to this ammonia issue.
 

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Read the fine print on your Prime. I believe it can show 0.25 ammonia.
 

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I have a super overstocked 68 gallon, and had the same issue with "Prime". It caused me to make disastrous changes only to find out I was fighting a "small print" issue.
 

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Large water changes do not have to shock your fish if you match parameters (including nitrate, in other words, keep nitrate low always so clean water from a change does not change nitrate much...ideally from 20ppm to 10ppm.
 
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