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Is plant fertilizer safe for fish? What do I need for a planted tank?

Updated on September 23rd, 2025

will an iron rich fertilizer hurt my fish? I just got a Green Wendth to help my small aquarium with 2 small neon fish. i am tring to naturally balance the environment. Do i need to get specific rocks for the bottom? oh , i also got one of those green moss ball to help clean up the tank. I am not sure what to do from here.

1 Answer

Most Helpful Answer

Kelvin Fujikawa

Answered By Kelvin Fujikawa

Aquatic expert

Published on July 23rd, 2017

When used as instructed, plant nutrients and fertilizers designed specifically for aquarium plants will not harm aquarium fish. Allow new aquarium plants to settle and establish themselves before adding any fertilizers.

Use aquarium plant substrates such as CaribSea Eco-Complete Plant Substrate http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=9087
to get your plants established faster. Seachem Flourish Advance Natural Phytohormone Supplement http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=33890
will help stimulate root growth vital for overall plants health.

Even though you have plants with low to moderate light requirements, be sure to use aquarium light specifically designed for planted aquarium use (sometimes called plant lights) and have the lights on between 10 and 12 hours a day. You may need to adjust the photoperiod (the amount of time the light is on) depending on how your plants are doing and to prevent unwanted nuisance algae growth.
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