Your Cycling right? If you are you want die off thats what cycles your tank//
Some people do weekly water changes I Suggest let it be and once Ammonia and Nitrites are 0 then do a water change..
Once you do a water change wait 2-5 days and do another test..
Ammonia and Nitrites Should be 0
Nitrates <20 ppm
this is the biggest Battle
Weekly brush anything that looks dead on your rock..
Do you have sand or bare bottom?
I would suggest Bare Bottom First..
Then Siphon all the Decayed stuff once its cycled..
I wish I did it like my friend he added PVC
Pieces for the rock to elevate it then once cycled he added sand..
You can do it like I did it but its harder to clean sand..