The palm pilot power supply would do just fine.
Yes, that will work with what you ordered.
Hi Chris - glad you get sorted.
Just note - 2 of the 3 power supplies you shown is DC 5V - should be fine as the relay works from 3 to 32Vdc. If you look at Steve's drawing - follow the positive (+) terminal from the walmart/PSU - through the HEATER on the controller to the SSR - mark this as (+) and this terminal relates to the (+/terminal 3) on the SSR. If you get the polarity wrong you could damage the SSR. One of the PSU's show the terminal polarities as well.
I don't have a controller manual - but don't set the control hysteresis to small - your controller will then activate the SSR frequently to keep the temperature in a tight band. - Each time the SSR switch there is a power component over the contacts and the SSR starts to heat up. So try to mount it on a flat piece of metal - copper/allu/steel to dissipate heat (just don't use your nearest's pots/pans - that's lethal) using heat compound/-washers in between - if available. Also 110Vac is dangerous - so try to keep all open connections covered/insolated.
You don't say what your air pumps current or power consumption is?
That should be great
You are more than welcome.
The item the youtube build recommends is a contactor. Similar in many ways to what you have purchased. No worry with what you have purchased.
Since you have a wooden tank, I would recommend just ensuring that your recirculating pump is correctly grounded. It likely has a fairly substantial metal housing, will be used all the time and should have a ground already. This will suffice.
A "Wall Wart" is a slang term for the little black box that you plug into the wall to power little electronics. It is an AC to DC transformer. Most people have them laying around from misc broken things. for example an old toy, rechargable battery or tool, old laptop computer power cord/supply. Basicly you need a way to get a DC current to run the SSR you purchased. Google "Wall Wart" and you will see what I mean.
I have read that Stainless elements are best, but with difficulty finding what you need, I don't know if they are really essential. The standard element would work just fine, I am not sure if there would be some risk to the fish?? May be worth further research there. Personally, I would purchase the same item used and stocked for water heater.
They are zinc coated and have copper elements. $11 us.
You may reach out directly with one of the moderators on this site to ask if they can give you a straight up answer (Based on fact not theory) on if there is any risk in using one element vs another.
Pentair is a supplier in FL that carries products for commercial aquaponics and aquariums. They sell replacement elements for systems they sell for this purpose and they are Copper / Nickle elements. Same as what your local hardware store sells you for your electric water heater.