Good morning all, i wanted to know is it worth getting the Neptune Dos and DDR? I'm doing a coral tank with fish and i didnt want to waste money on getting things that i really don't need. I wanted to see your thoughts on it. Thanks in advance
Sounds like maybe you are new to the hobby? If so, you pretty much summed up the honest reply by stating getting things you really don't need or wasting money.
In short, you can manually dose additives or simply do water changes to meet initial demand(s) while getting experience under your belt. As you progress you will get a better understanding of what you want to do and how. This is when you make these decisions. It will save you money in the long run. More so if you decide it is not your jam.