Hello!
An update...
This has turned out to be a bit of a saga!
After helping my mate set up a tank for his boy with a cute little submarine that the boy especially chose........
I used some of my mature filter media (ceramic media, a bit of filter sponge, few handfuls of gravel etc) and put into the Fluval U2 filter they have in the tank. Turned heater temp to 28C / 82F.
Explained about cycling process and should test every few day to keep eye on ammonia, nitrites etc, gave hime my bottle of ammonia to use for dosing for cycle. Also gave out paperwork for the Fishless Cycle printed out from this forum and the link for this forum if he wants to read further into fishless cycles, and to text me daily with updates etc.
Five days later, he has not done anything at all, tested once and readings were Ammonia 0.25, nitrite 0, pH 8.2. He also turned the tank heater down to 26C! No idea why he turned heater down as told him to keep it at 28 to help bacs until cycle finished, but 26 is ok, just a bit slower.
No idea if he has a nitrite spike or anything.
So I sort of assumed that may be past already since nitrite at 0, so told him to dose for 3ppm Ammonia and see what happens in 24 to 48 hours, I used forum calculator and told him to dose 0.39ml of my ammonia (its 35% strength) and test in 24 hours and give me results.
2 days later (yesterday) he told me he added 3.9ml of ammonia.....
not 0.39ml and unsrprisingly ammonia is off the charts.
Told him to do at least 90% water change to get rid of most of the ammonia and refill with de-chlorinated water asap and test for ammonia at least an hour after water change.
Today he said ammonia at 4ppm, still a bit too high so recommended to change 25% of water, use de-chlore etc. Then retest an hour after.
Have I advised him to do the right things? Will the bacteria from my filter to his tank still be viable, may take a few days to get back on track perhaps.
Reckon he has made hard work of this! Think I am more stressed than he is about his fishless cycle!