LED Aquarium Lighting

Aquarium Lighting Guide: Get the Best Light for Healthy Fish & Plants

We can help you navigate your way through all the types of lights in fish tanks and determine which type is best for your aquarium.

Updated on October 23rd, 2025

Your Guide to Healthy Freshwater Aquarium Plants & Thriving Fish

Learn how to pick the right aquarium plants, substrate, lighting, and fertilizers to ensure that your aquarium plants thrive and stay healthy.

Updated on October 23rd, 2025

Master Aquatic Plant Care: Lush Aquarium Plants & Happy Fish

Tanks with live plants can be excellent additions to your home, bringing a touch of nature indoors. Learn how to take care of aquatic plants.

Updated on November 6th, 2025

Aquarium CO2: Lush Plants, Vibrant Tanks & Thriving Aquatic Life

Wondering why you may need CO2 in your fish aquarium? Learn the basics from a Petco aquatics specialist.

Updated on October 23rd, 2025

Your First Fish Tank: Easy Setup Guide for a Thriving Aquarium

Everything you need to know about how to start a fish tank. Learn about setting up an aquarium, choosing the right type, and acclimating new fish to your tank.

Updated on March 31st, 2026

Is an LED flashlight safe for fish if my tank light is broken?

Hello, and thanks for contacting Boop by Petco. Yes, the light itself is safe as long as 1) you secure the flashlight in such a way that you can be 100% certain it cannot fall into the tank, and 2) the flashlight doesn't create excessive heat.

Why is my Betta tank suddenly full of algae after adding an LED light?

Too much light, whether natural or artificial (green/yellow LEDs can worsen the issue) can sometimes cause an increase in algae growth. Moving the light around a bit to see if it helps, changing to a different type of LED, or just cleaning the tank more regularly/adding in algae eaters may help.

20-gallon tank setup: What fish and supplies do I need to get started?

A fish tank will need a filter, a light/hood and a heater. Make sure the filter is rated for at least twice the tank volume. The heater should be adjustable since water temperature will depend on the species of fish. Good "starter" fish include Tetras, Mollies, Danios or Tetras. A new tank should be set up and left running empty for several weeks before adding fish. A pinch of flake food can be sprinkled in daily. This "cycling" will allow a population of beneficial bacteria to colonize the tank and filter. These bacteria will break down wastes (ammonia, nitrites and nitrates) which are toxic to fish.

What fish tank sizes are included in Petco's $1 per Gallon Sale?

##### What are the dimensions of tanks in the $1 per Gallon Sale? [Here](https://www.petcoach.co/question/?id=411222) are the answers to some of our most frequently asked questions: - What are the dimensions of my new tank? - What kind of hood will fit my new tank? - What kinds of stands will work with my new tank? - What kind of lighting is recommended for my new tank? **Aqueon10G**, **Marineland10G** - Product Dimensions: 20 x10 x12 - Compatible HOODS: Aqueon 20" Deluxe Full Hood - Compatible STANDS: the Brooklyn 10G, Aquatic Fundamentals Silver Vein Scroll 21x11 - Compatible LIGHTING: Aqueon 20" Deluxe Full Hood **Aqueon20 High**, **Marineland20 High** - Product Dimensions: 24x12 x16 - Compatible HOODS: AGA 24"BK VERSATOP GLASS - Compatible STANDS: Newport 20G - Compatible LIGHTING: Aqueon 24" fluorescent strip light or 24" LED light fixture (online only), Fluval Ultra Bright LED Aquarium Strip Light (online only) **Aqueon20 Long**, **Marinela

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

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.