75 Gallon water parameters

[SaraJames]

So my salinity is low around 1.020 and I know I need to figure out how to raise that. I currently only have RODI but I can get saltwater if needed.

Ammonia 0
PH 8.4
Nitrite 0
Nitrate 10-20ppm

How should I go about fixing this Nitrate issue and the salinity?

 

[ScottJ]

You can top off with seawater till you get up to 1.025 or where you want to keep it. The main thing is, you want to adjust it slowly, like take several days, a week to raise it.

What nitrate issue? 10 to 20 is fine! Wish mine ran that low

 

[Ryanliyikun]

Your nitrates are actually fine—10–20 ppm is totally acceptable, especially for a newer tank, so I wouldn’t try to lower them right now. The bigger priority is your salinity at 1.020, which is quite low. The safest way to raise it is slowly by topping off with saltwater instead of RODI over a few days until you reach ~1.025–1.026. Avoid big jumps—slow and steady is key to not stressing anything