Having A Crisis!

[Ny82]

Hi everyone, let me start by telling you a bit about my setup. 64 litre tank, has been running for about 2 weeks with the new filter I added the bottled bacteria to the new filter for the first week. It also has the filter from my old tank which was running since november.
I am due a water change tomorrow but I thought i'd test the water and these are the results:
ammonia - 0
nitrites - 0
and then theres this

on the left the PH dropped right down at 6-even though I have the crushed coral in the tank. We have soft water in Scotland has that got anything to do with it? I did hear from another member that stable PH is better than exact PH.
On the right is the nitrates. I have never had a nitrates test until the kit came this morning and that's sitting at 0 too. What shall I do? How can I sort this out?
Thanks in advance.

 

[Prime Ordeal]

Having a pH of six isn't exactly a disaster as long as it's stable at that pH. You could add more coral to the filter or add some coral sand to the substrate.

The nitrate is registering zero because you haven't banged the second bottle of the nitrate test hard on a surface a good few times. This releases the precipitate that solidifies at the bottom of the bottle. You then need to give it a really good shake for at least 30 seconds.

 

[snazy]

Wasn't you Ph higher than that before? Is that the tank where the fish died?
I'd say test your nitrates like Prime Ordeal suggested.