New Swiss 1900 liter (500G) Build

[crusso1993]

For the past couple of months I've noticed that I'm changing/swapping the two DI canisters on my RO/DI unit more often. I'm reading the TDS of the RO water going into DI canister #1 and the TDS of the water coming out of the same canister. As soon as the water coming out of DI canister #1 shows anything other than 0 I move DI canister #2 to position #1 and the used DI canister is emptied and refilled and becomes DI canister #2.

Yesterday I was getting a TDS of 2 coming out of canister #1 after only about 380-400 liters (around 100G) of water was made since the last change.

This seems very low. I remember when I was filling the tank for the first time I was getting about 1,200 liters of water before a DI change...

I read somewhere that a 10" DI canister should take out about 3,800 TDS. My RO water going into the DI canister is measuring 3-4 TDS. Which means that I should be getting between 950 and 1,200 liters out before changing DI.

Something is off and I suspect that it may be the quality of the DI resin. After the first fill of the tank due to availability I purchased the Triton DI resin (the 5 liter boxes). I would have thought the Triton DI would be top quality?

I will order some of my previous brand of DI resin (Fauna Marin) and see if the culprit is poor quality DI resin.

Can anybody think of another reason this could be happening?

If you're on a well and have recently had heavy rains you could see a possible increase in TDS.

 

[devolver02]

sweet tank

 

[Laith]

If you're on a well and have recently had heavy rains you could see a possible increase in TDS.

Not on a well... tap water is around 200 TDS

 

[Laith]

sweet tank

Thanks! A work in progress... ;Happy

 

[dragon99]

You have your reservoir automatically being refilled by the RODI correct? The problem is likely TDS creep. Every time the RO shuts off and then starts up again there's a burst of high TDS water that gets through the RO membrane. If the unit is cycling frequently it will burn DI resin more quickly.

 

[Laith]

You have your reservoir automatically being refilled by the RODI correct? The problem is likely TDS creep. Every time the RO shuts off and then starts up again there's a burst of high TDS water that gets through the RO membrane. If the unit is cycling frequently it will burn DI resin more quickly.

Yes the reservoirs (fresh saltwater and RO/DI topoff water) are being automatically refilled... but not as soon as the level goes down: I have float sensors at the top and bottom so they only start refilling when they are empty. And the fresh saltwater tank holds about 270 liters (70G) and the RO/DI topoff tank holds about 150 liters (40G).

So any TDS creep will be offset as the tanks take about 7 hours and 13.5 hours to fill...

For info, here is the setup:

 

[emvanburen]

When the salt tank is empty and then refilled with RO does your auto water change stop until you add salt?

 

[Laith]

When the salt tank is empty and then refilled with RO does your auto water change stop until you add salt?

Yes, as soon as the bottom float is triggered, the Profilux turns off the AWC (the Litermeters) and powers the solenoid which starts the refill.

 

[Laith]

I need a lot more practice taking pictures with the DSLR but here are some...

FTS today:

Still looking empty!

The screen is my wife's teleworking station...

 

[Laith]

Some of the corals. The Mitras lights have a photo setting for taking pictures but I haven't yet used it.

 

[Laith]

And to show the growth:

14 December 2019

5 April 2020

I'm happy with that! ;Joyful

 

[Laith]

And the clownfish are constantly breeding. This must be at least the 10th time since they were moved into the new tank. They were breeding in the 250l tank but not as consistently.

 

[emvanburen]

Very nice! Looks great!

 

[Laith]

Very nice! Looks great!

Thanks! Can't wait to see it in a year or two when it will have more fish and lots more coral!

 

[Laith]

My online fish supplier is still delivering... and seems to have some good stock levels.

I may order a school of anthias ;Happy. They have both the Bartletts and the Lyretails, as well as Tukas. I've never had Anthias but as far as I have read, Bartletts are smaller than Lyretails and Tukas are very difficult to keep...

Any recommendations?

 

[Laith]

Leaning towards the Lyretails as it seems the Bartletts tend to die off one by one?

 

[emvanburen]

I have 3 bartletts. There was some attrition but seem stable now.

 

[Laith]

And I just saw the price of the Bartletts ;Wideyed. A large school would drain the bank account!!

The Lyretails are a quarter of the price... I'm thinking of getting a school of nine.

 

[Laith]

Ordered nine Lyretails... and two Mandarin fish.

The tank is full of cocepods for the Mandarins, even more so than before I started dosing the phyto. So I'm assuming that the phyto is feeding the cocepod population... ;Happy

 

[Laith]

And the other evening while looking at the tank I noticed this:

That's called "keeping an eye out"!! ;Happy;Joyful