Sure. There are lots of other options you could try. I have only used option #1 so be sure to research the others.
Option #1 - I use the Neptune DOS ($300) for automated water changes. The setup is very simple. You tell it how many gallons you want changed over a 24 hour period and it does the rest. It’s great but also requires a base APEX unit ($500) so it might be too high of a price point for some folks.
Option #2 - You could have a similar setup using EcoTech Versa pumps ($150 each). I’ve seen YouTube videos where people program 2 of them (one to pull out water, one to add fresh salt water) at the same time. Probably a cheaper option if you don’t already own an APEX and would be precise measurements because you are using dosing pumps.
#3 AutoAqua makes an all-in-one water changing kit ($210). Because my water tanks are on a lower floor I didn’t expect the pumps to be able to handle the head pressure. If your reservoir is close to your tank it might be a good option.
#4 For about ~$100 you could put together a “no more hauling buckets” option. Using two pumps, two smart outlets, and some hose you could pump old water out of your sump and new water into it. It wouldn’t be completely automated (unless you added float switches) but if you were willing to watch it, it is a simple setup. I use this setup to fill my auto-top off container and control the pump from my phone.
Hope this gives you some ideas. For a 180 gallon tank you don’t want to be hauling buckets.