Do you have an auto top off on the tank?
I like my xp aqua duetto
Put a piece of tape or something to mark the water level on the tank. Or use your hydrometer to measure and add enough water to keep the salinity at 1.024. Depending how hot/dry your home is, water can evaporate very quickly.
Sharpie marks on sumps FTW!
For your tank, the level is going to go down in the back chamber where your pump is located. The main tank level will not go down so it will appear that you aren’t losing that much water. Just top off however much you need to keep the back chamber level the same.
starting to learn this quickly.
your 100% right hadn’t noticed early on.
Also, fill this return chamber up all the way just before the water stops cascading into it. That should be your full level to refill to if there are no markings.
Definitely. Don't use tap.
Yes. You are replacing the evaporated water. If you top off with salt water you will increase your salinity. As stated before only water evaporates... not the salt. That's why you are experiencing the salinity spikes. With such a small volume of water you should have an ato. Doesn't take much evaporation to change the salinity in that amount of water. Also by adding too much RO you can decrease the salinity. Thats why an ato would benefit you tremendously.
what about add salt water of a lower level as appose to fresh R/O water? like a level of 1.015?
The salt does not evaporate, so if you start off with the proper salinity, you would not want to add any more salt into the aquarium. The water that evaporates is pure water so you should replace it only with pure water (RODI). The only time you want to add saltwater is if you are replacing water that you manually removed, like with a water change.
