Cycling Brackish tank

Im currently cycling a 40 gallon brackish tank. Its been cycling for about 3-4 weeks now and Im still getting readings of:

Ammonia (0.6 mg/L)
Nitrite (0.1 mg/L)
Nitrate (5 mg/L).
1.010 S.G.

the readings have not changed in a weeks time, so Im confused as to what is going on. Should I just leave it or do a water change?!

thanks in advance

RadleyMiller;658865; said:

It should be done cycling soon, just wait it out. What is in or going to be in it?

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My grunting toadfishes