Are there any tube length limitations as far as connecting your KH / ION Director, Doser 2.1 / Maxi Doser, AWC / ATO, etc.?
Would like to have a separate cabinet with all the GHL equipment in it - 3-4 feet from the aquarium and sump.
Then obviously RO water and pre-mixed saltwater would be even farther away...
The dosing pumps can push / pull up to 50 feet.
Are there any minimum or maximum lengths for the tubes connecting the KH or ION Director to the Doser 2.1 / Maxi Doser?
The length of the tubes connecting from the KHD to Doser should be followed according to the manual and will depend on how you position the devices (stacked or side-by-side). The If you are referring to the length of the tube from the testing device to the sump, that length can be longer, but should still be kept as short as possible.
The length of the tubes from testing device to doser can be found at the 1-minute mark of this video:
https://www.youtube.com/watch?v=v9HuLpuQkJQ&t