Pacific Sun Kore 5th dosing Fan Club

[BfishLpond78]

It does matter where the containers are. Even units like the DOS have flooded tanks with stuff when the containers were higher then the unit.

It's pretty much even with where it's being dosed. If the containers where lower than where the liquid was being dosed, wouldn't the liquid then back siphon back into the container? It would be a two way road in my opinion.

Unless i'm missing something here?

 

[soulpatch]

Not with a check valve that is recommended for just about every doser's dosing lines. Stops the back siphon into the container.

 

[Tweaked]

Not with a check valve that is recommended for just about every doser's dosing lines. Stops the back siphon into the container.

Huh, a check valve on the lines. Been dosing for years and never heard of such a thing. Are they liquid specific? Can you point me to them? Thanks

 

[BfishLpond78]

Huh, a check valve on the lines. Been dosing for years and never heard of such a thing. Are they liquid specific? Can you point me to them? Thanks

+1

Never have had a check valve on any of my dosing units. Would be curious to see what people are using.

 

[soulpatch]

I havent bought any for this doser yet as it sits on the new tank build uneeded yet.

That said a check valve is just a rubber flap so they are not liquid/non liquid specific. Most use check valves for airline tubing as they stop back siphon of tank water into an air pump...and work just fine for a doser line given you get the right guage for the hose line you use. And I will admit that I have not looked yet for Pac Sun as again I haven't needed to and my attention was on other aspects of my build.

 

[BfishLpond78]

It was my understanding that the rollers should be pinching the lines flat which would not allow a siphon either way.

 

[soulpatch]

+1

Never have had a check valve on any of my dosing units. Would be curious to see what people are using.

I had to put them on my older jabeo doser and used simple air line check valves. Otherwise I would back fill into the dosing container.

but the jabeo used standard dosing lines whereas the pac sun seems to use a metric size which might be an issue for us in the US to find plumbing for.

 

[BfishLpond78]

Have used the BRS 1.1 dosers previously and never had an issue with siphon problems.

I guess i'll wait for PacSun to chime in...

 

[soulpatch]

It was my understanding that the rollers should be pinching the lines flat which would not allow a siphon either way.

Perhaps intent and the way they should be working but a 3 cent check valve is worth the security no?

My Tunze ATO is supposed to work flawlessly as well with 2 float switches but it still has a built in timer kill in the pump just in case.

Always worthwhile to install some backups in our tanks...machines dont always do what we expect

 

[BfishLpond78]

What check valves are you using currently?

Lol my tunze ATO has worked flawlessy for 4.5 years

 

[soulpatch]

Have used the BRS 1.1 dosers previously and never had an issue with siphon problems.

I guess i'll wait for PacSun to chime in...

Again I havent use theirs yet as it sits mounted in my tank but no need to operate at this time so you might have a bad pump head. Happens.

But I remember them mentioning check valves earlier in this thread and I wouldnt operate without one personally just as a backup.

 

[Fcsteve777]

Some people run them some dont, some dosing pumps have more issues than others with leakage. The thicker tubing would probably be less likely to leak than the smaller stuff. The dosing heads on this unit are similar to the jaebo style with the 3 plastic rollers.

 

[soulpatch]

Lol my tunze ATO has worked flawlessy for 4.5 years

I have had the kill timer run a couple times as I forgot to clean a float on monthly maintenance. Stuff happens but always glad for backups.

As for valves something like this is what I had used previously and will probably do so again:

http://www.amazon.com/Aquarium-Clea...456504254&sr=8-2&keywords=airline+check+valve

 

[BfishLpond78]

Some people run them some dont, some dosing pumps have more issues than others with leakage. The thicker tubing would probably be less likely to leak than the smaller stuff. The dosing heads on this unit are similar to the jaebo style with the 3 plastic rollers.

I guess at this price point I wasn't expecting to have additional items. I understand the reason for redundancy, was just hoping to avoid it.

It's a shame they are so similar, was expecting different quality when I looked inside the dosing head.

 

[Tweaked]

It does matter where the containers are. Even units like the DOS have flooded tanks with stuff when the containers were higher then the unit.

If this were true, why don't my lines drain back into the containers. Just using three year old BRS dosers for the record.

 

[Przemek_PacSun]

i bought AWC module the is 2 dc pump and 2 pine inside box
i set it up and make a try but its hard to use my problems is
1) there is no check valve in the box so waste out pump is syphon tank water from sump so this is very big crisis and risk for aquarium .
2) there is no option to calibrate 2. dc pump so first pumps flow rate and 1. pumps floow rate is diffferent .
why you dont check this issues before selling this product?
is there any solves for this problems ?
and why you dont have any videos or tutorial for your modules ?
i was thinking to buy your lighting fixtures but now start to think again

Checkbox are not designed to work with DC pumps. DC AWC set is designed to pump out/in waste/fresh water without using them.
Only rule is that waste water tubing out should be above water level in sump(to protect against siphon effect).
The same about fresh water tubing.

Second question - it's not needed to calibrate pump #2 - because it will work till level sensor will report proper water level("old" level before doser started AWC procedure).

Alright...i'm going to try and keep my cool here....

I have doser number 4 set to C5 at 5ml for my acropower, start dosing at 11:15pm

Please....Please tell me what that setting should do?

C5 is program for 5 corresponding dosing every hour with first dose at 11:15pm.

Yes, yes and yes

The dosing motor doesnt fully pinch off the line so the liquid just kept dripping all night. I haven't touched the lines inside the motor at all.

I'm so fed up with this unit.

It's not good idea to use doser mounted below liquids - our doser have three rollers pump head but due hydrostatic pressure some water can drip thru tubings any liquid. This can happened with any dosing pump - and risk is higher proportionally to difference in height between liquid and doser.
On 1m difference its 1.000kg pressure for each 1 square meter. We designed special acrylic mounting top which allow to mount doser in cabinet(to ceiling) if there is no space for doser). Doser can be mounted also withiut acrylic mount - using special 4 holes in doser housing.

It's pretty much even with where it's being dosed. If the containers where lower than where the liquid was being dosed, wouldn't the liquid then back siphon back into the container? It would be a two way road in my opinion.

Unless i'm missing something here?

No, there is no siphon risk until your tubings output are above water line(in sump). If you want to put tubings under water(you can do that also using our DropDose whcih protect against evaporating liquid from tubing) - check valves are recomended but everything depend from doser/installations - each tank is different.
i know that our service is in contact with you, hope that you will not give up.

Again I havent use theirs yet as it sits mounted in my tank but no need to operate at this time so you might have a bad pump head. Happens.

But I remember them mentioning check valves earlier in this thread and I wouldnt operate without one personally just as a backup.

I dont think thats bad pump head - I dont know how old this doser is but all of them are tested by our workers against presure, motor speed etc.
I think that rather there was issue with liquid presure and slowly liquid dripping.

 

[Fcsteve777]

If this were true, why don't my lines drain back into the containers. Just using three year old BRS dosers for the record.

The point is that it's still possible if there was an issue with the pump. There are people that run check valves on any dosing or ato pump as insurance.

 

[soulpatch]

If this were true, why don't my lines drain back into the containers. Just using three year old BRS dosers for the record.

I did not say it was an absolute. I stated that it does matter where your containers are as ti increases your risk and other types of units including the highly touted DOS have had issues with this.

I am sure there are plenty of people with the DOS, PAC SUN, ect who have no issues as the pumps seal tight enough or are lucky whereas others do have issues.

Regardless even if it seals perfectly with use it will wear. If a couple penny back up is too much and a deal breaker against a particular company then you need to get into some of the higher end medical grade pumps IMO. Even when I worked in labs though with thousands invested in pumps we had check valves on all of our lines.

I guess I have always been raised to not trust a single point of failure if it can be avoided.

 

[Przemek_PacSun]

If this were true, why don't my lines drain back into the containers. Just using three year old BRS dosers for the record.

In Kore 5th unit liquids also not drain back into container. Check valves can be usefull when you need pump liquid 1m above doser - to prevent drip back check valves "stop" liquid and dont allow move them back to bottles.
But for typical instalations(doser in cabinet/holder) and liquids below doser but also in cabinet - it work as it was designed.
I think that Kore5th and BRS use the same kind of dosing pump - with three rollers inside(and probably the same shape/size).

 

[Fcsteve777]

Brs is a 2 roller on an armature industrial style pump made by a peristaltic pump company. Not the 3 roller friction driven off of the motor shaft.