More then 2 dossiers

[Perthegallon]

Hello guys so I just bought my self a apex trident and apex dos I was wondering if I should buy a 2 apex dos and if so what should I use for the 4 pump then or should I just keep the one?

 

[sde1500]

Do you need to dose something? I wouldn’t buy a doser just because.

 

[Perthegallon]

Do you need to dose something? I wouldn’t buy a doser just because.

Wondering if I should start dos I don’t really need to do water changes