I bought a batch of cheap float valves from eBay that I use as backups in case the ones built into my ATO fail, and one up top in my overflow in case a big sally lightfoot crawls in again and blocks the return (don't ask). Programming them into the BoBs is trivial and eases wear and tear on your carpet!
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90g reef / 55g sump / 300 watt LEDs / CSC-120 skimmer - regal tang, yellow tang, unicorn tang, blue devil damsel, clownfish, lawnmower blenny, diamond watchman goby, yellow prawn goby, foxface, coral beauty angel, flame angel, mandarin goby, lots of inverts and LPS corals. Saving up for 300G tank :-)
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