Kitsune

I use Seachem Flourish for my plant fertilizer. I just looked at the bottle and realized it has copper sulfate in it

Now I have just added my kuhli loaches to my main tank but before adding them i had done a full scale cleaning including a 50% water change and rinsing the filter etc. And I haven't added the flourish for almost a week, sooo hoping that it is not too much in the system.

I know that copper is bad for invertebrates and scaleless fish. Is it is the same with the copper sulfate? And can anyone recommend a plant food that doesn't contain it? I want to keep my plants healthy but I definitely don't want to harm my fishies

mathas

I've used Flourish with inverts and scaleless fish, and I saw no adverse effects.

Copper sulfate is toxic, but as with most chemicals, toxicity depends upon species and concentration.

AquaticCommunity.com says the following:
According to SeaChem, the recommended Flourish dosage is 5ml per 250L, or around 20ppm, and copper makes only up 0.0001% of that (http://www.seachem.com/Products/prod.../Flourish.html). This is well under the 39ppm figure noted above, which is the only species I could easily find toxicity info for.

And since copper is a micronutrient for plants, what little is introduced will be utilized rather that build up over time.

Kitsune

Woot! Thank you I was worried since I know people have had problems with algae wafers that contained copper and I have a couple of cherry shrimp that are going into a tank that has used this product as well and thought oh no lol

Butterfly

Yep I use it in my loach tanks and never had a problem
Carol