New Water Heater Question

[West1]

2 years ago I purchased a new Water Heater that was a 9 year warranty... Yesterday as I was going to do a water change on my 300, I noticed the warm water was out irked. The Thermocouple went bad so I had the option of calling a Plumber to replace the gasket and Thermocouple or go through the Wonderful Home Depot return line... I went with Plan B at 7pm.

After 2 hours, I got a new one since they found the purchase on my "Remodel HD Card" and they honored the exchange even though they are supposed to send me to the manufacture first (Plan B payed off ).

Finished Installing it at 10Pm and then had dibree clog up my faucets (45-1hr later, I finished cleaning them)

Woke up at 3:30am to get to work...

Now! Here I am still wanting to do a water change for the fish sake...

So after all this, is it Okay to do a water change with a Newly Installed Water Heater about 12 hours young?
Yes I will be adding Prime and dose 1 cap extra to my tank/sump water volume (total of 8 cap's full- 300gl+100gl Sump that is just under half full of water).

I hope im over thinking this but I would rather think to deep than not think enough and kill/injure my fish

 

[plumberbaltimore]

there are or should be 2 covers on the side of the heater. 1 screw holds the cover on. Underneath each cover is a control for the thermostat. Make sure both are set at the same temp. About 125 degrees should be ok for you. There should be a mark for this temp. Turn the breaker off to the heater if it makes you less scared to take the cover off. Just be careful what you touch if you don't turn it off.

Plumber Baltimore

 

[Dan F]

I think you should be fine, but to be on the safe side you could do some laundry, dishes, and take a shower. Any residue in the tank will get flushed out this way without wasting a bunch of hot water. Another option would be to shut off the breaker and open up a few hot water taps and let them run for a while.

plumberbaltimore, did you even read the O.P.'s post?