50,000 litre tank in a boutique hotel (Bangkok , Thailand)

[Museet]

Your sulphur reactor , was it custom made or you can just buy it off the shelf . Do you have any recommendations?


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We have rebuilt other types of filters into sulphur filters. They can be done pretty easily, As long as the flow is right(low flow) and you can get anaerobic conditions in a filter, it might work. Also it needs an overflow.

So I can't recommend any brand. But I do like many of Deltecs reactors and filters.
Here's a nitrate filter from Deltec:
https://www.theaquariumsolution.com/product/3029/89
This filter is using a carbon source, but could easily be switched into a sulphur filter. Or you could run it like they decribe as well, might be as effective, I don't know.

/ David

 

[sirichok]

Installing a sand filter with dosing pump ( lanthanum chloride)to counter phosphate problem .


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[notoriousreef]

What a thread and what a build! Thank you so much for sharing, its been a complete blast seeing you take this from shambles to luxury!

 

[Museet]

Installing a sand filter with dosing pump ( lanthanum chloride)to counter phosphate problem .


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Exciting!

What type of material/sand will you use? AFM, silica sand or someting else?

/ David

 

[sirichok]

Exciting!



What type of material/sand will you use? AFM, silica sand or someting else?



/ David

I am using silica sand for this purpose . Your sand filter is installed on a close loop or open loop ?


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[Museet]

I am using silica sand for this purpose . Your sand filter is installed on a close loop or open loop ?


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Okey. Just make sure you keep the sand in oxigenated water(avoid water/filter standing still with water in it). Can't say why, but those times our filters have been standing still(and then started again), we have gotten increased silica values in our ICP tests. As long as it's water flows through the filter there hasn't been that kind of increase.

Not sure what you mean by open loop. Our two filters take in water from close to the bottom of the tank and release the water to the tank. I guess it's a closed loop then
The backwash water goes out where we can choose to save the water and recycle it or let it go to the drain.

I would start the filter with a proper backwash, to get silica dust out from the sand.

/ David

 

[BruceWayne]

Following

 

[Monkeyfish]

Stalker ^

 

[sirichok]

Okey. Just make sure you keep the sand in oxigenated water(avoid water/filter standing still with water in it). Can't say why, but those times our filters have been standing still(and then started again), we have gotten increased silica values in our ICP tests. As long as it's water flows through the filter there hasn't been that kind of increase.



Not sure what you mean by open loop. Our two filters take in water from close to the bottom of the tank and release the water to the tank. I guess it's a closed loop then

The backwash water goes out where we can choose to save the water and recycle it or let it go to the drain.



I would start the filter with a proper backwash, to get silica dust out from the sand.



/ David

Thanks for your advise . Now I am running the sand filter system and start dosing lanthanum chloride slowly over a period of hours per day and hopefully the phosphate will come down sooner than later .
As for nitrate , I have started dosing vodka and and controlling feeding , so far it has come down slowly to around 25 ppm and hopefully will be able to settle around 2-3 ppm .


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[Museet]

Thanks for your advise . Now I am running the sand filter system and start dosing lanthanum chloride slowly over a period of hours per day and hopefully the phosphate will come down sooner than later .
As for nitrate , I have started dosing vodka and and controlling feeding , so far it has come down slowly to around 25 ppm and hopefully will be able to settle around 2-3 ppm .


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Nice work! Sounds like your are on the way. Just let the changes take some time, not lowering the PO4 or NO3 too fast. I find it easier to level out/keep values stable if the lowering has been slow.

I would aim for 5ppm NO3. If you come close to 0 you might get cyanobacteria, so I like some margin.

Great to get an update. Looking forward to the progress.

/ David

 

[sirichok]

Nice work! Sounds like your are on the way. Just let the changes take some time, not lowering the PO4 or NO3 too fast. I find it easier to level out/keep values stable if the lowering has been slow.



I would aim for 5ppm NO3. If you come close to 0 you might get cyanobacteria, so I like some margin.



Great to get an update. Looking forward to the progress.



/ David

What is the value of Po4 in your tank ? What is your preferred target ?


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[Museet]

What is the value of Po4 in your tank ? What is your preferred target ?


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We try to keep it between 0,02 and 0,08 ppm. But as long as it's stable it might be okey with a little higher values too I think.

 

[sirichok]

50,000 litre tank in a boutique hotel (Bangkok , Thailand)

We try to keep it between 0,02 and 0,08 ppm. But as long as it's stable it might be okey with a little higher values too I think.

Thanks for the information . I noticed two effects regarding the addition of Lacl3 . First I notice a drop in KH so I assume that Lacl3 bind with phosphate as well as carbonate . Secondly I notice that raising magnesium is a lot harder and take more amount of magnesium chloride . Do you experience any effect on raising magnesium while dosing Lanthanum chloride ?

Best regards


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[Museet]

Thanks for the information . I noticed two effects regarding the addition of Lacl3 . First I notice a drop in KH so I assume that Lacl3 bind with phosphate as well as carbonate . Secondly I notice that raising magnesium is a lot harder and take more amount of magnesium chloride . Do you experience any effect on raising magnesium while dosing Lanthanum chloride ?

Best regards


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Did a search and you are right. Sorry, I didn't know!

I had to look through our notes from when we have used LaCl. Sometimes the KH drops a little, sometimes it doesn't(at least not much enough for us to see). Perhaps our doses have been very small and the KH drop is small too.

About magnesium and LaCl I don't know. I know I had trouble raising the Mg when only meassured with Salifert, but that was probably because the test wasn't that good. Nowdays I rely on the ICP tests for Mg.

Not the best answers this time, sorry for that

 

[sirichok]

Did a search and you are right. Sorry, I didn't know!



I had to look through our notes from when we have used LaCl. Sometimes the KH drops a little, sometimes it doesn't(at least not much enough for us to see). Perhaps our doses have been very small and the KH drop is small too.



About magnesium and LaCl I don't know. I know I had trouble raising the Mg when only meassured with Salifert, but that was probably because the test wasn't that good. Nowdays I rely on the ICP tests for Mg.



Not the best answers this time, sorry for that

Thanks for your advise .

Now the phosphate level is down to 0.05 ppm . KH is at 7.8 DKH but still struggling with No3 at 25 ppm .

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[Museet]

Thanks for your advise .

Now the phosphate level is down to 0.05 ppm . KH is at 7.8 DKH but still struggling with No3 at 25 ppm .

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Great job!! Hope you can find a good way to keep it stable around 0,05ppm.
Yes, the nitrate usually take some time to lower. Just be careful if you use a carbon source, not to overdose and not to get too low phosphate. Adding a carbon source often lower both NO3 and PO4, but if PO4 deplete the NO3 won't go down(and corals might be a bit unhappy with zero PO4). So make sure to monitor the nutrients so that doesn't happen. Ive also seen Cyanobacteria start to grown when PO4 was depleted.

Looking forward to updates on the tank!

/ David

 

[sirichok]

Feeding time.

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[Monkeyfish]

In the top left of the pic; what kind of fish is that? Some kind of parrotfish?

 

[McPuff]

I love that trigger... looks pretty big!

 

[sirichok]

In the top left of the pic; what kind of fish is that? Some kind of parrotfish?

Yes a parrot fish .


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