In a marine REEF aquarium nitrates should be kept as close to 0 ppm as possible. In a fish only marine aquarium you should strive to keep your nitrates below 20 ppm.
the country that has the most nitrates in the air is the U.S
Not if the stand has flat edges and is on a level surface. If it is not level, then you should use the adjustable feet
level 10 for and level 20 to unlock, i am using this site for all the happy aquarium infohttp://www.yayeasy.com/game/happy_aquarium/
The max level for the marine in Aliens: Colonial Marines is level 60. Once the marine reaches level 60, they will have unlocked all available abilities and upgrades for the character.
There is only one way to get the aquarium in Wizard 101. You will have to pass the level.
If your aquarium is not level it could stress the glass and eventually cause a crack or break; a difference of 1/4 inch is the highest it can safely be
evapouration
what level are you? maybe you may refer to this list, http://www.yayeasy.com/happy_aquarium/happy-aquarium-levelexp-information/
There is a list of how many points are need for each level up to 46 on Gamezebo's Happy Aquarium strategy guide: http://www.gamezebo.com/facebook-games/happy-aquarium/walkthrough
It could be any number of aquarium diseases. take a sample of water and the next fish that dies to your local aquarium store and have them looked at.
Check the nitrates. Clean the tank. Condition the water. Treat for disease. Remove fish that seem unhappy or distressed or sick. That's all i can give you maybe you need to take logs of everything you do and check with the local peet shop to ensure everything is correct.
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