As the title states im looking for opinions on both dosing options. Not sure if if a calcium reactor would be needed for my 25 gallon AIO as i am geting by manually dosing 2 part but i really like the consistency it allows for. I have a nano sized calcium reactor and a Reekeeper lite priced at about 550 for everything i would need. The intial price is a punch to the neither region so im hoping in the long run it would be cheaper to run. So far the pros i have for the calcium reactor are. - consistency - now i have a reason to run a controller - possibly cheaper in the long run Dosing pump pros. -cheaper at start up -less room taken up in my stand. Any input would be great.