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Currently the Kalk stirrer is hooked to the Apex & switches ON for 2min. Once every hour. Quite a waste to use the Apex for this simple purpose. Tried using one of those standard smart wifi power plugs. But those only allow a max of about 16 events (i.e. 8x on + 8x off) This is not enough for the kalk stirrer. Objective of this mini project was to free up one plug on the Apex so it can be put into better close loop control of equipment (instead of just using as a standard timer) Using an FRM01 timer board. Set to Function 5 T1 = 2min, T2 = 60min The trigger button is added to manually trigger the stirrer to switch on. Case part is printed. Box is mounted to a 'dry' section of the cabinet.

Tested my nitrates again today and I realised a significant drop to about 10ppm! It was between 50 to 100ppm last week. I also read online that when nitrites spike, the nitrate readings on test kits will show an increase. So was what I was experiencing a NITRITE instead of NITRATE spike last week ?[emoji848] Sent from Singapore Reef Club mobile app