[quote:d94be3ec7c="neon"]1. CO2 injection rate very high even using the external reactor.
2. Is my dosing routine appropriate?
3. What could also be causing my algae problem?[/quote:d94be3ec7c]
1)Seems so in your case. Your reactor size is too small as is evident by the escaping of bubbles from the reactor outlet. Consider making a larger unit yourself using pvc pipes and using an individual powerhead for running the reactor instead of your filter flow which tends to slow down after a while due to clogging. Feed the output of the CO2 into the powerhead suction (no backpressure as it is always sucking and hence less potential for leaks. Does not require a checkvalve as well.)
2)Cut to 2x a week.
3)Some funny results from your test kits. Remove the coral chips from the filter and add only baking soda after every water change to buffer the water. A KH of 3-4dKH is fine. You do not really want to add a variable to your readings do you? The readings seems way off in your case...Is your critters fine? Do a very large water change of 80% to reset the tank well. Do your test set again without the coral chips in your filter. Add back the baking soda to target a KH of 3. Watch your pH for the day or so.
Regards
Peter Gwee
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