As soon as nitrates have reached zero. Don't ever change more than 20% water a week. If you have fish in the tank during the cycling process you will need to change some water if the nitrates are in the deadly range to keep your fish alive. Otherwise I recommend an additive such as Prime to keep nitrates from killing fish during cycling.
you don'tYou can't break the glass in happy aquarium because it is only a virtual game.
Generally, hymen break will not cause change in period dates. However, a woman's cycle will keep changing quite often even due to change of climate.
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Yes,you can still get pregnant on your period,although the chances may be lower than if you were
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If you notice an ammonia spike after a water change in your aquarium, you should immediately test the water parameters and do a partial water change to dilute the ammonia. Additionally, check your filter and make sure it is working properly. Monitor the ammonia levels closely and consider adding beneficial bacteria to help break down the ammonia.
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
Continue through the break then break the week before you wish to start the new cycle.
If your period wasn't due & you're on birth control, then this is break through bleeding. Birth control stops you from ovulating. If you're currently on the 7day break or sugar pills then this is normal.
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Some women have had 'break through bleeding' when pregnant. This resembles a period. However, this is not what typically happens. In most cases, when your period arrives, it means that you are not pregnant.
The ammonia level may still be high after a water change because the beneficial bacteria in the aquarium may not have had enough time to establish and break down the ammonia. It is also possible that the tank is overstocked or overfed, leading to excess ammonia production. Regular water testing and maintenance can help address high ammonia levels in the aquarium.