yabadaba
Fish Crazy
Thanks for that. I'll keep a close eye on things...particularly the pH and just do another water change if/when it get close to 6.2.There are just too many variables to know for sure but I agree with OM47 that usually just a large water change will be sufficient to get you farther down the fishless cycling road.
Without a KH measurement you don't know how much buffer is in there to resist the downward movement forced by the now more rapid rate of nitrate production. And of course that rate is a variable itself. Another factor though is that its a lot of fresh tap water, a large volume, so a number of tank conditions will have changed due to that and it may be enough to take you on out to the end of the fishless cycle!
~~waterdrop~~
Water changes on my existing 110 litre tank and son's 60 litre tank only take a few minutes, but it's a much bigger operation with this new tank that is around the 500 litre mark. Mind you, I'll have to get used to doing weekly (albeit smaller) changes on it, so I guess I shouldn't start complaining now!