Ive bee looking at the app and I’m trying to figure out if there is a way to have my drive port controlled hydros branded doser, dose based on PH. What I’m trying to do is limit my night time drop in PH by having my doser come on and add saturated kalk to keep my tank above 8.2. Is this possible? And is there a guide somewhere to set up controlled dosing?
Can you control dosing based on PH?
- Thread starter Mikey V
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I think you are looking for the Hyrdos dynamic dosing. It does exactly this.
thom_smith
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Just because it is a doser doesn't necessarily mean you need to logically configure it as such. The Kalk Reactor output likely does exactly what you want to accomplish. Alternatively Generic does too. Select your pH as the Input and configure a tight pH On/Off Point range such as Low 8.19/High 8.20 and Active When ph Low. Then Enable Pump Advanced Settings to expose additional control options. Adjust your Pump Start Time, Run Time, Run Count and Run Intervals accordingly.
If you have a faster rate fixed pump such as Hydros doser, you need to put a little more thought into understanding demand then calculating dose quantity and frequency of doses to avoid rapid spikes of pH and/or alkalinity. For instance, Start Time 22:00, Run Time 00:02:00, Run Count 40, Run Interval 00:15:00. This example would run 2 minutes on/13 minutes off every 15 minute interval between 10pm-8am (40count x 15min interval = 600min = 10hrs) only if pH criteria is met. If pH criteria is not met, the dose is skipped.
If you're using a peristaltic pump where you can slow the speed down to drips or very slow stream (depending on demand) then it may be safe to run continuously during nighttime hours. To do this, you'd set Start Time 22:00:00, Run Time 10:00:00 and Run Count 1. (Set your desired times accordingly.) This example runs continuously 10pm-8am if pH criteria is met.
If you have a faster rate fixed pump such as Hydros doser, you need to put a little more thought into understanding demand then calculating dose quantity and frequency of doses to avoid rapid spikes of pH and/or alkalinity. For instance, Start Time 22:00, Run Time 00:02:00, Run Count 40, Run Interval 00:15:00. This example would run 2 minutes on/13 minutes off every 15 minute interval between 10pm-8am (40count x 15min interval = 600min = 10hrs) only if pH criteria is met. If pH criteria is not met, the dose is skipped.
If you're using a peristaltic pump where you can slow the speed down to drips or very slow stream (depending on demand) then it may be safe to run continuously during nighttime hours. To do this, you'd set Start Time 22:00:00, Run Time 10:00:00 and Run Count 1. (Set your desired times accordingly.) This example runs continuously 10pm-8am if pH criteria is met.
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A word of warning and I know people do this and has nothing to do with the Hydros but beware of dosing calcium hydroxide based on PH. It can be overdosed if something depresses your PH to much. You could end up with a snow storm or build up in your pump etc.
thom_smith
HYDROS Expert
Completely agree! Often when answering kalk related questions I include a similar warning. The snow storm or buildup while very real is still a minor concern. You could quickly decimate coral blindly dosing to maintain pH without considering alkalinity.