Need help with an Apex command

[WhatCouldGoWrong71]

I want a DOS head to engage the program I have it on when PH is greater than x.xx.

I want to bounce between Sodium Hydroxide and Sodium BiCarb. It’s easy on the Hydroxide pump (If PH > x.xx then off), that works well. But if I do the opposite for the other pump (if PH > x.xx then on) it turns the pump on nonstop, it doesn’t allow the pump to follow the programming. Does anyone have any ideas?

 

[Pistondog]

I want a DOS head to engage the program I have it on when PH is greater than x.xx.

I want to bounce between Sodium Hydroxide and Sodium BiCarb. It’s easy on the Hydroxide pump (If PH > x.xx then off), that works well. But if I do the opposite for the other pump (if PH > x.xx then on) it turns the pump on nonstop, it doesn’t allow the pump to follow the programming. Does anyone have any ideas?

Please post exact code in order.

 

[WhatCouldGoWrong71]

DOS_1 is Sodium Hydroxide
Code:
IF PH > 5.67 THEN OFF

DOS_2 is Sodium BiCarb
IF PH > 5.67 THEN ON

I want both pumps to have the following program turn on or off depending on PH levels:

DOS_1 is fine. DOS_2 with that command only turns the pump on permanently, it doesn’t revert to the program listed below.

 

[Pistondog]

You need a SET off/on to define the state opposite your conditional.

 

[WhatCouldGoWrong71]

You need a SET off/on to define the state opposite your conditional.

I’ve done for DOS_2 is Sodium BiCarb
1) Set ON
2) IF PH > 5.67 THEN ON

1) Set OFF
2) IF PH > 5.67 THEN ON

Neither are working. Sorry, I am not code writing friendly, so I may need granular instructions.

 

[Pistondog]

Dos 2 should be set off.
Just noticed you are trying these with profiles.
Not sure how they play together, sorry

 

[Lbrdsoxfan]

I'm betting part of your issue is the PH state isn't changing quick enough for the sodium bicarb. I'd prolly run it off of a measured dump instead of relying on the ph probe to change state. Meaning every 'x' amount of hours add 'x' ml's of sodium bicarb.

 

[Jason_MrFrags]

Try

DOS_1 is Sodium Hydroxide

IF PH < 5.67 THEN ON
IF PH > 5.67 THEN OFF

DOS_2 is Sodium BiCarb

IF PH > 5.67 THEN ON
IF PH < 5.67 THEN OFF



After giving it more thought I believe you need to setup/use a profile for the DOS in place of the ON though

 

[Reef-_-Noob]

Try

DOS_1 is Sodium Hydroxide

IF PH < 5.67 THEN ON
IF PH > 5.67 THEN OFF

DOS_2 is Sodium BiCarb

IF PH > 5.67 THEN ON
IF PH < 5.67 THEN OFF



After giving it more thought I believe you need to setup/use a profile for the DOS in place of the ON though

This will not work the apex will crash with error code 403 forbidden. Needs to be different values for the on off variable. The off variable should be higher than the on variable. It may never turn on though unless you are dosing a solution outside of the aquarium

 

[Reef-_-Noob]

This will not work the apex will crash with error code 403 forbidden. Needs to be different values for the on off variable. The off variable should be higher than the on variable. It may never turn on though unless you are dosing a solution outside of the aquarium

That's an http protocol error never coded with apex but the logic should be correct

 

[Jason_MrFrags]

This will not work the apex will crash with error code 403 forbidden. Needs to be different values for the on off variable. The off variable should be higher than the on variable. It may never turn on though unless you are dosing a solution outside of the aquarium

Just did it on one of my unused outlets to test and loaded successfully.
only issue I see is if you get a ph of exactly 5.67

 

[Gtinnel]

I’m no expert at programming but if the off statement works then why don’t you just set both so that there is a condition that turns them off and not on.

DOS_1 is Sodium Hydroxide
Code:
IF PH > 5.67 THEN OFF

DOS_2 is Sodium BiCarb
IF PH < 5.67 THEN OFF

 

[WhatCouldGoWrong71]

I’m no expert at programming but if the off statement works then why don’t you just set both so that there is a condition that turns them off and not on.

DOS_1 is Sodium Hydroxide
Code:
IF PH > 5.67 THEN OFF

DOS_2 is Sodium BiCarb
IF PH < 5.67 THEN OFF

I tried this one and it worked. @Jason_MrFrags I will try yours tomorrow. I think I am OK missing a dose when it splitting the uprights. This tank went from around 40ML a day of 2 part to over 300 a day in 2 weeks once I started getting after the PH. Nuts...

 

[WhatCouldGoWrong71]

Thank you guys. I was watching my dkh plummet when the hydroxide was hitting the rev limiter.

 

[Reef-_-Noob]

You should be able to use >= or <= depending which one you want. This means greater than or equal to

Edit : only use it on off or on variable not both

 

[Reef-_-Noob]

There is also != not equal to but don't use that it will never turn off or on depending

 

[Cabinetman]

Thank you guys. I was watching my dkh plummet when the hydroxide was hitting the rev limiter.

I’m experiencing the same thing. The higher my ph gets using the sodium hydroxide my demands are going nuts