alanbates12
New member
I"m sure this is in the thread but honestly I'm lazy right now, when you added your sump did you use RODI water to fill it up and was the salinity the same as the tank.
I"m sure this is in the thread but honestly I'm lazy right now, when you added your sump did you use RODI water to fill it up and was the salinity the same as the tank.
An off subject question, Assuming you have a skimmer and it's in your sump do you have an Auto Top Off system. This will help a few things. 1, it will keep your water level the same hence no fluctuation in your salinity. 2, It will keep the area where your skimmer is located at a constant level and keep it from doing to much or to little skimming. If the level is to low your skimmer may have a difficult time and if it's to high your skimmer may go crazy. Just FYI. Also there are plenty of DIY ATO systems
I had three 5g buckets full of good water at roughly 1020-1025 for the sump. It's possible that is where the drop in salinity came from, but I thought it would be a non-issue. I usually keep salinity around 1025.
I'm curious was your sump a prefab, old aquarium or someone gave it to you.....
I do have a refractometer.
I left Friday night and topped off before I left, and came back Sunday evening. I was only gone for just over a day, but there was significant evaporation in that small amount of time. SG was 1026 when I got home...
I have left my tank go longer and have experienced fluctuations of up to .005 before without much consequence. I'm not saying this isn't the issue, I just don't know if it is the primary issue. I'll get a pic of the frog when I get home... It looked bad last night...
I used a refractometer and had a run of bad luck. The arm was sticking and not giving me an accurate reading, I had no idea. Because I trusted my reading I added more salt and lost a few things in my tank. I'm not quite sure because this could have been because I was very new and was doing lots of stuff wrong but I went on line and bought a Milwaukee MA887 refractometer and its GREAT. So now I do only a few things wrong. You use RODI water to zero and when your ready to test it's a couple drops of water and push a button. Now I do push the button three times and usually it will give me a reading of 1.025 twice and maybe 1.024 once. So I call this 1.025. I'm very happy with it. It's a bit pricey, $110.00, but what in this hobby isn't. The satisfaction of knowing my salinity is spot on is worth it to me. Check it out, http://www.milwaukeetesters.com/MA887.html
The type I have has the eye piece you look through and the level of SG is indicated by a blue line. I assume its much more accurate than the plastic hydrometer I had been using. I should probably zero it out and recalibrate though, it's been almost a year since I did that.