Restarting Tank

Hi Sue

No I didn't add any bicarb. Out of the tap my Nitrate is 3ppm. I only asked about doing a lower water change as having just done a 90% on Friday I am hoping I can get away with a smaller one.

Ok, will do a large change. But apart from that, with ammonia and nitrites at zero, I could add fish tomorrow for instance?

In theory, you can get all the fish on your wish list. But there may be some species that do better in mature tanks (ie once that has been running trouble free for several months) rather than a newly cycled tanks, so they will have to wait a bit.
But if you don't want any fish that need mature tanks I would still say get no more than 80% of your wish list as this leaves a bit of wiggle room should something not go as planned.

Of course, you may find the shop that stocks all the fish you want won't let you buy them all at once, so you'd need to be devious eg ask a friend to buy some of them for 'their' tank.

Good news 

That's good news and sounds promising.
 

Yes, that's right.

The reason for this is adding too much ammonia makes so much nitrite it stalls the cycle. Adding just 1 ppm at least 4 days apart keeps the ammonia eaters fed and stops nitrite getting to stall point (~15 to 16 ppm). Depending how fast ammonia drops to zero after the 3 ppm dose of ammonia in stage 6, that could mean adding 1 ppm in as little as 4 days, or 6 days later or 8 days later - there must be 2 zero readings for ammonia 2 days apart.