Planted macroalgae tank but liquid fertilizer contains copper?

[HAAAAAAAA]

I wanted to make my 60 gallon tank a planted macroalgae and connect it to my 210g which has a tessalata eel

I wanted to use a liquid fertilizer to dose infrequently since my eel only eats about every other week but the liquid fertilizer contains about 0.0032% of copper per ml

Will this be ok with my eel or should I not risk it and just get the brightwell chaeto grow which is about 3 times the price of this fertilizer

 

[Drowned in Salt]

I wanted to make my 60 gallon tank a planted macroalgae and connect it to my 210g which has a tessalata eel

I wanted to use a liquid fertilizer to dose infrequently since my eel only eats about every other week but the liquid fertilizer contains about 0.0032% of copper per ml

Will this be ok with my eel or should I not risk it and just get the brightwell chaeto grow which is about 3 times the price of this fertilizer

Just use skimmate