Just bought a 600ct humi and need advice

[DPD6030]

I can tell you from having both that Shilala beads are rock solid. Like I said earlier I haven't had to add anything to them for around 4 months. On the other hand heartfelt at least in my case it seems to add water every month or so. I ended up getting rid of most of my heartfelt and got Shilala beads. I still use HF in the cooler though.