Sponge filter question

[Bix22]

I bought an active sponge filter from angelsplus to try and cycle my 3 month old uncycled tank.

Question 1 - how far from the bottom of my tank do I mount the sponge? It has a magnet on the side to hold it in place.
Question 2 - how long does it typically take to remove the ammonia?
Question 3 - is there anything else special I need to do or just let it run its course and check the parameters daily?

I installed the sponge yesterday and ammonia reduced from 2.0 to 1.0 this AM. Nitrates increased from 5 to 10. No nitrites yet ( I have yet to see nitrites in my 3 months w the tank)
Ph is always 8.2

20 gallon high tank




Here's how I set up the sponge is this right?

 

[BillD]

I would put it right on the bottom. the flow of water through the filter will improve the closer to the bottom it is.

 

[Bix22]

How long should it take to remove 2.0 ammonia?

Should I do any water changes?