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Why does my goldfish go to the bottom of the tank to pick up gravel?

My goldfish goes to the bottom of the tank and moves the gravel with his mouth. What is he doing? Thank you! Also, how do you find out what gender a Black Moor Goldfish is and a Pearl Goldfish?

I am wondering if the gravel I have is suitable for my corydoras?

The gravel is composed of uncoated, unpolished, small shards. The package states that because of the mineral content, it may buffer the ph. Will the ph be low or high?

Healthy 10 gallon freshwater tank with colored gravel and plastic plants!


tank is ten gallon has: 1 guppy 1 dwarf gourami 3 corydoras 3 black tetras

Buying used aquarium gravel?

I have a 75 gallon aquarium that I have converted into freshwater from salt, and its up and running minus the gravel. I would leave it bare but I want to put live plants in it. The gravel at the pet store is the perfect size but its way too expensive. So I looked at Lowes and the smallest they have is pea sized gravel and it’s just not small enough for my taste. I am considering to buy used gravel from someone. Is this okay to do? I was thinking of just cleaning it with boiling water and perhaps un-iodized salt.
In the end I might breakdown and just get the Lowes gravel. Has anyone used that kind? Does it vacuum well?

How can I replace gravel with new gravel without losing beneficial bacteria?

I have some gravel in a cycled tank, but I want to replace it with a different colored gravel for a more “natural” look. How can I go about switching out the gravel without losing any beneficial bacteria or harming the tank/fish?

How can I replace gravel with new gravel without losing beneficial bacteria?

PYTHON GRAVEL TUBE ASSMBLY 30″

  • Category: AQUARIUM
  • Manufacturer: PYTHON AQUARIUM PRODUCTS
  • Sub-Category: MAINTENANCE EQUIPMENT
  • MFR-PART-NO: GT30
  • Made By: PYTHON AQUARIUM PRODUCTS

Product Description
30″ GRAVEL TUBE ASSEMBLY… More >>

PYTHON GRAVEL TUBE ASSMBLY 30″

what colour betta will go best with this colour gravel?

http://www.seapets.co.uk/products/aquarium-supplies/aquarium-ornaments/coloured-gravels/roman-gravel-rosso-red-2k.html

i want to get this colour gravel, but im not sure what colour betta would go well with it
just to add i already have a dark blue betta, so i dont want another blue one. any other colour is fine

can i put already setup aquarium gravel to jump start the nitrogen process?

the way i understand it is that u get a couple fish to create waste wich gets converted to ammonia (already setup aquarium’s gravel’s job) and that gets converted to nitrites and then to nitrates which gets consumed by plants?