gtag('event', 'conversion', {'send_to': 'AW-972395556/RN4nCJnV4tkCEKSo1s8D'}); -->
I used dump buckets on my tank 20 years ago... the splash and resulting salt creep made them unreliable and a PITA!
The extra tank /siphon are the way to go
What size is your tank? Can the tank and overflow handle the surge/ extra water?