did u turn ur filters off when u did a pwc? most of ur bacteria ur growing grows on ur filter, so if the tap water did get into ur filter it may have killed all ur bacteria because of the chlorine in ur tap water..meaning u may have to start back to square one. But if the water wasnt in ur filter ur good im betting. Also it depends how how long after u put the water in ur tank to u noticing it.
Hi, Thanks for reply,
Yeah i turned off filter when changing water and dont think water would have went into my filter as the holes for water to get in are quite high, but not 100% sure. I put tap water into tank and then about 1-2 minutes later, put dechlorinator in.
If i had to start from square one? Can i just leave the water thats in there now?
Also, if the tap water didnt affect the bacteria, it means now 3 weeks without any nitrIte showing?
Many thanks,