is food coloring safe for fish?

[koizilla714]

Back in the 90's there was some Ich treatment that was blue and once you dropped it in, it would turn the water blue(stain the silicon some too). I would have to say yes to some degree but I would advise against going out and buying any over the counter stuff without making sure it is safe for the fish.

that's methylene blue, but it will kill beneficial bacteria tho.

 

[honestea]

Like how much?

 

[honestea]

I think it's a crazy idea. Why take the risk.

 

[ehh]

I'm more curious why you want to see the flow.

 

[Hendre]

I'm more curious why you want to see the flow.

^^
I just use the movement of plants, fish and food as an indicator

Like how much?

Not sure

 

[Deadliestviper7]

It's ok as long as u don't overdo it,(I wouldn't go more than a couple drops per gallon)

 

[koizilla714]

^^
I just use the movement of plants, fish and food as an indicator


Not sure

i don't have any plants on my tank and tried putting flakes but fishes would just devour them quickly.

 

[Hendre]

i don't have any plants on my tank and tried putting flakes but fishes would just devour them quickly.

ping pong ball? unless the fish could eat that too

 

[Lepisosteus]

Ingredients are 1) water, 2) phosphoric acid 3) sodium benzoate. Phosphoric acid may raise your phosphates a little, sodium benzoate is toxic but deemed safe for human consumption in small amounts. I would say food coloring is safe to add. Do a water change afterwards to remove it

 

[koizilla714]

ping pong ball? unless the fish could eat that too

that would float and will not visually show water circulation