So, I have way too many tanks to go out and buy off the shelf ATOs. I know how to build a simple float switch relay, and may end up going that route, but I'd like optical sensor a lot better.
Anyone have a decent guide for a diy version of this?
https://premiumaquatics.com/product...MItMHZqIz74gIVBcpkCh3ICg-jEAQYBCABEgK_CfD_BwE
Anyone have a decent guide for a diy version of this?
https://premiumaquatics.com/product...MItMHZqIz74gIVBcpkCh3ICg-jEAQYBCABEgK_CfD_BwE


