Replacing water used by Trident

[fdevans]

Does anyone replace the water used by the Trident with mixed saltwater? I have a Dos head that's un-used and I'm running the 6/3/3 schedule which is about 84ml per day. Over time it would seem between that and ATO I'd see a drop in salinity. Thinking about putting some fresh mixed water in and dosing the 84ml over the course of the day right after tests are done.

I tried searching for discussions on this, but couldn't find one.

 

[Radman73]

Honestly not something that I've ever worried about. Do you actually see a salinity drop? I suppose if you go without water changes then you could over time.

 

[Gtinnel]

I just watch my salinity and add a little saltwater if I see it drop any. The water removed by the trident is fairly negligible in my case compared to the water pulled out by the skimmer.

 

[MONTANTK]

Honestly, it all depends on your tank size and how often you’re changing water. If your tank is over 100 gallons I doubt you’d see any kind of drop if your doing frequent water changes. If you’re under 50 gallons I would monitor your salinity and see if it’s worth setting up the Dos. Under 50 gallons I would definitely add saltwater back

 

[ariellemermaid]

Does anyone replace the water used by the Trident with mixed saltwater? I have a Dos head that's un-used and I'm running the 6/3/3 schedule which is about 84ml per day. Over time it would seem between that and ATO I'd see a drop in salinity. Thinking about putting some fresh mixed water in and dosing the 84ml over the course of the day right after tests are done.

I tried searching for discussions on this, but couldn't find one.

I’ve been running a 20g with the Trident for about a year. Despite the small volume of the tank I haven’t noticed any significant issues with salinity. I do twice weekly water changes, and I do 3/2 testing. .

Doing some math we can answer your question. We’ll assume 85ml/day * 30 days divided by your total volume in ml = % of water being replaced with DI. For a 20g this comes out to 3% and 3% of 35ppt is 1ppt/month. In my case it’s more like 0.8ppt since I do less testing. I guess I’ve just never noticed that because of the twice weekly water changes meaning the most change I would see at a time would be half of that.

 

[fdevans]

Honestly, it all depends on your tank size and how often you’re changing water. If your tank is over 100 gallons I doubt you’d see any kind of drop if your doing frequent water changes. If you’re under 50 gallons I would monitor your salinity and see if it’s worth setting up the Dos. Under 50 gallons I would definitely add saltwater back

Ha... well I'm right in the middle with a 75 gallon tank+sump capacity (after subtracting rocks, etc.). I guess I'll just keep an eye on it and see if I'm noticing changes.

I’ve been running a 20g with the Trident for about a year. Despite the small volume of the tank I haven’t noticed any significant issues with salinity. I do twice weekly water changes, and I do 3/2 testing. .

Doing some math we can answer your question. We’ll assume 85ml/day * 30 days divided by your total volume in ml = % of water being replaced with DI. For a 20g this comes out to 3% and 3% of 35ppt is 1ppt/month. In my case it’s more like 0.8ppt since I do less testing. I guess I’ve just never noticed that because of the twice weekly water changes meaning the most change I would see at a time would be half of that.

Thank you! I'll add this to some calculations sheets I've started. This will help give me a sense of impact. I've been holding off water changes slightly as my nutrients were a bit too low for a period of time and ran the risk of dinos.

 

[Billldg]

I never have. It is so small that most water changes and such will take care of it.

 

[ReefRondo]

I don’t notice any change whatsoever on either of my trident controlled tanks. Never even considered it.

 

[ColoredRock]

...84ml per day.

Your trident is taking roughly 2 shot glasses a day I guess roughly .6 of a gallon a month (not doing the math) so someone correct me if I am way off base.

If you dont do any water changes, might want to look into a bit more.