Again, that would depend on specifics, such as type of disinfectant, residual level at taps, drip rate, etc.
As an example a local buddy of mine had a 100 gallons dripping in on a daily basis (500 gallon tank) with chloramine treated tap water @ 2ppm on average. He dosed a Seachem Safe/water mix into his tank to ensure the chorine/ammonia residuals were also reduced. On a drip system with only a small residual of chlorine, one might get away with zero conditioner. It all depends on the set up, and the tap water.
As an example a local buddy of mine had a 100 gallons dripping in on a daily basis (500 gallon tank) with chloramine treated tap water @ 2ppm on average. He dosed a Seachem Safe/water mix into his tank to ensure the chorine/ammonia residuals were also reduced. On a drip system with only a small residual of chlorine, one might get away with zero conditioner. It all depends on the set up, and the tap water.