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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
Learn how to care for semi-aggressive fish, recommended diet & aquarium setup. Find the right food, supplies & equipment at your neighborhood Petco.
Updated on December 21st, 2025
Acclimation helps your aquatic life adjust to the new chemistry of your tank, thereby helping ensure the health of your new addition.
Updated on October 23rd, 2025

Learn general guidelines and the many factors that go into attaining and stabilizing the correct water temperature and how to acclimate your fish.
Updated on October 23rd, 2025
Learn how to care for Guppy fish, recommended diet & aquarium setup. Find the right food, supplies & equipment at your neighborhood Petco.
Updated on October 23rd, 2025
Goldfish need powerful filtration. Your filter should be rated for at least twice the tank volume. Once you get a test kit, check the chemistry. Aim for 0 ppm ammonia and nitrites with nitrates at about 40ppm. Use a kit that has liquid reagents, not strips. The liquid kit is more accurate. The pH should range between 7.2-7.6. Being cold water fish, goldfish thrive between 65F and 72F. You can dissolve 1 teaspoon of plain aquarium salt (NOT table salt) per gallon of water to use as a general tonic. It will reduce stress, improve gill function, treat minor infection and aid in recovery. Treat for 10-14 days then reassess the condition of your fish. When performing partial water changes, treat only the volume of water being replaced not the entire tank volume. Change no more than 30% of the volume at a time. Use only aged or conditioned water that is temperature matched to prevent stress or shock.
Updated on September 24th, 2025
Maintain pristine water quality. This is the foundation of treatment. It will require partial water changes every few days and a complete cleaning of the substrate (if any) and any tank furniture. I see you have frogs, which can make treatment trickier. In tanks without amphibians or scaleless fish, plain aquarium salt (NOT table or Epsom salt) can be used at 1 tablespoon per 5 gallons of water for 14 days. You can remove the frog(s) and treat them separately if you want to use salt. The Pimafix, or Melafix also, can be used in conjunction with salt.
Updated on September 24th, 2025
Unfortunately there is no effective cure for mycobacteriosis in fish. Skimmer should be removed from the tank and the water of the main tank should changed gradually but completely over the next month. There are environmental factors that favor growth of mycobacterium which include low dissolved oxygen, low salinity, low pH, warmer water, and high organic loads (food feces and vegetable matter). Various antibiotics such as rifampin, erythromycin, streptomycin, kanamycin, doxycycline, and minocycline have been suggested as possible treatments, but a clinical cure is unlikely. I would suggest a check up at your local aquatic vet to confirm your suspicion and attempt a treatment.
Updated on September 24th, 2025
The ammonia spike was likely a result of decaying plant matter. As long as you maintain pristine water quality, Goldilocks should heal. Use a filter that is rated for at least twice the volume of the tank. Since goldfish produce a larger than average bio-load (waste), you may need to perform partial water changes regularly in addition to filtration. Use only conditioned water that is temperature matched to prevent stress or shock. Goldfish are cold water fish and do best between 65 F and 72 F. Use an additive, such as Stress Coat, to promote healing. A home test kit should also be used to monitor chemistry. Aim for an absence (0 ppm) of ammonia and nitrites with nitrates at 20ppm or less. If you don't have a teat kit, the local Petco may test water for free or for a small fee.
Updated on September 24th, 2025
Some iron is necessary for a healthy aquarium, but too much can promote algae growth or impart an unsightly yellow or orange tinge to the water. Reverse osmosis (RO) filters are deal for removing mineral and heavy metals from water but they can be prohibitively expensive. Buying RO water from a local market or pet store is also a possibility but not economically feasible if you have a large tank. The best option may be a Polyfilter, which can be purchased in the local pet store or online. These filters will remove iron or other metals/chemicals and must be changed monthly or quarterly. You can also buy a water conditioner that will precipitate out some of the iron which can then be removed by mechanical filtration. An example of just one is Rid Metals (by Kordon). Follow label directions carefully, perform regular water changes and monitor iron levels with a home test kit or by submitting a water sample for testing.
Updated on September 24th, 2025