I am using the GHL 2.1 doser to dose 2 part. I have the airline tubes out of the water and ALK and Cal are doing 10 minutes apart. the ALK airline tube is getting a bit of precipitation at the end of the tube. I know this is from evaporation. Is there anything i can put on th end of it to stop this fro happening? any advise??
2 part dosing precipitation
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Randy Holmes-Farley
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But that will cause precipitation of calcium carbonate on it and in it.
jsker
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:mad:
Humor me, why.
If the tubing is below the water line then and reside will be dissolved.
Randy Holmes-Farley
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The liquid in the tube is super high in alk and pH. As that mixes with tank water, and calcium drifts up the inside of the tubing, the supersaturation is very high and calcium carbonate will precipitate on the tip and inside the end of the tubing.
jsker
Reefing is all about the adventure
Yes, In a stagnated situations that would be true. I most systems with circulation in the sump or back filter the alkalinity would bleed out tubing before for the Ca was dosed.
I would suggest to give more time between does, so that the depletion of the alkalinity will not accrue. I use a 15 minute time window between doses of Ca before alkalinity to make sure there is no perception. I also dose every three hours and found that may parameters stay steady through out the day.
Randy Holmes-Farley
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Yes, In a stagnated situations that would be true. I most systems with circulation in the sump or back filter the alkalinity would bleed out tubing before for the Ca was dosed.
I would suggest to give more time between does, so that the depletion of the alkalinity will not accrue. I use a 15 minute time window between doses of Ca before alkalinity to make sure there is no perception. I also dose every three hours and found that may parameters stay steady through out the day.
Do you have the alk drip end underwater? What exactly are you dosing? Folks that have tried underwater tips often find it clogs, and the problem is mostly resolved by pulling the tip from the water. The calcium is not from the next dose, it is already in the tank water. That high alk and high pH solution is in the tip and sits there stagnant for hours with calcium penetrating it and precipitating.
