Sicce scuba heater problem

[Manose]

I have 2 of the 300watt versions and while they keep my tank at somewaht my desired temp they will not work with a controller.
This my question
I have 2 older titanium heaters Finnes Thu series from my old aquarium that I had washed off and put away.
Even though they are cleaned up and been dry for a month will they carry any of the bad things from my old aquarium such as aiptasia spores or anything bad like that?
Just want to use them till I order some new ones like these
Amazon product ASIN B0CSTGBXJ9

 

[Dread Pirate Dave]

How were they cleaned up? :)

 

[Manose]

How were they cleaned up? :)

Soaked them in citric acid for awhile then rolled them up in a towel and put them away

 

[Dread Pirate Dave]

They should be fine then. :)