Auto top-off unit for a 5.5g pico

[sevenof9]

Worth it? If so, what brand? Should I use RO? What about a DIY auto top-off unit?

Thx,
7of9

[reefnetworth]

i use a 20oz. plastic bottle with DI filtered/purified water. only additives are: homemade calcium, dKH (Kent) superbuffer, & (Kent) Tech-M. doseage is once a month. calculated and dispensed in an infant syringe found in Wal-Mart pharmacy. they hold 10mL/2 Tblsp. for around $1.99 ea. good luck & REEF-ON!