I buy the gallons of Concrobium Mold Control from Lowes and put in a tank sprayer. 

This ensures the fuel never runs out and I don't have tenants dumping in questionably sourced fuel 5 gallons at a time at a time.

Your tank type heater keeps 30 or so gallons hot all the time.

For toilets, I'd been using the 1.28 gpf type, but a fantastic .8 gallon per flush toilet is now on the market, it's called the Niagara Stealth, and it should be purchased at Home Depot(otherwise you're gonna pay like $50 or more to ship it somewhere.)

As the lady was giving me a tour, the husband was running behind us grabbing paraphernalia ( gallon zip lock bags full) and relocating out of my sight.

Also, I'm pretty sure there's a stamp somewhere on the tank that will tell you how many gallons it holds.

I was contacted by a Michael Gallon of S and M Financial group about a hard money loan.

They sell a $8 one gallon pump sprayer.  

I just bought a new 50 or 55 gallon typical gas HWH and it was about $600 or so.

I dumped a few 5-gallon buckets of hot water down there hoping to flush it out.