1/ I'd set up the FLuval 2+ filter. REMOVE THE MEDIA OF COURSE - so it's devoid of anything
2/ fill tank with normal tap water. Dose 5x the recommended of Miltons Fluid (or 10x up to you, I dunno I'm guessing but it's supersafe stuff for babies so go figure)
3/ Turn the pump on. and leave for a period of time. I'd guess at somewhere > 1hr, so yeah, 24hrs.
4/ Empty tank & filter.
5/ add normal tap water. Add 5x the recommended dechlor dose. Turn the pump on & let it run again for an 1/2 - 1hr. Dechlor works instantly.
6/ Empty tank & filter. Job done (hopefully).
7/ Add media + cycled ceramics to filter. Add the airstone to the filter.
8/ Fill tank again with normal tap water. Dechlor it as normal to the recommended dose. Turn on filter, heater & airpump.
9/ Add 4ppm ammonia, switch on that filter, get the tank up to 30 to 32C and away we go again cycling.
THIS TIME IT
WILL WORK...
...hopefully.
10/ Join local Church & pray everyday (after adding ammonia & testing water of course

)
Andy