TKOS said:
Neons are weak fish to begin with and it could easily have died due to toxic water conditions. Do some changes and things should get better. Of course the neons might already be damaged so even doing water changes now you may still see some die for no apparent reason. But for those that aren't sick or hurt the water changes will help a lot.
You are actually trying to keep the ammonia and nitrite levels low at this point. Nitrate is a good inidcator of when to change the water, try not to let it get much above 10 ppm.
good job you put me straight
ok nitrIte bad nitrAte not so bad
my mum actually only runs an under gravel filter doesnt seem to have the bio filters at all
she also has way too much gravel so i stole some

p to my mum)
thing is with my mum that it has run efficiently for years so there is no telling her that she should have less gravel or bio filters when she replies with i havent lost a fish in i dont know how long and she only changes water if her neons look a bit dull which hasnt happened in over a YEAR
her readings using my kit (she doesnt have one ) were 0 for the ammonia nitrIte and nitrAte and she had a ph of 7.6
she doesnt even remember cycling her tank tested my nitrIte again and it is not 0 but not the next colour yet either so probably half way to 0.25 still going to water change
when the tank is cycled will all three end up at 0 or should there be detectable nitrAte i know that is way off yet just curious
and will tank not fully cycle till i am totally finished stocking and it has settled after that or will it happen before then
is it every single fish that will have to suffer a spike till the bacteria catch up
and it is really hard doing small changes when you have to work out how much aquaplus to put in so checking if you can overdose the fish on it or if i accidently put too much in is that ok i am talking ml here not bottles if that helps