Yes, Guppys and Endler Guppys can be kept together in the same aquarium. Both species are closely related and can interbreed, so it's important to keep in mind that they may hybridize if kept together. However, if you are okay with the possibility of hybridization, they can coexist peacefully in the same tank as long as the tank is large enough to accommodate both species and provide enough hiding spots and plants for them to feel secure. It's also important to monitor the tank for any signs of aggression or stress and be prepared to separate them if necessary. **

No, Mollys and Guppys cannot crossbreed. They belong to different species within the Poeciliidae family and are unable to produce viable offspring together. It is important to keep these species separate in aquariums to maintain their distinct characteristics and prevent any potential hybridization. **

Guppys should be removed from the tank when they show signs of aggression towards other fish, especially if they are causing harm or stress to their tank mates. Additionally, if the tank is overpopulated and there is not enough space for all the fish to thrive, it may be necessary to remove some Guppys to maintain a healthy environment. It is also important to remove any sick or injured Guppys promptly to prevent the spread of disease to other fish in the tank. **

Black Mollys are known to be peaceful fish and typically do not exhibit aggressive behavior towards other fish, including Guppys. However, there is always a possibility of aggression or territorial behavior in any fish tank, so it is important to monitor the interactions between the Black Mollys and Guppys closely. Providing ample hiding spots and space in the tank can help reduce the likelihood of any aggression between the two species. **

If Guppys are found dead overnight, it is important to first remove the deceased fish from the tank to prevent any potential contamination. Next, check the water parameters such as temperature, pH, ammonia, nitrite, and nitrate levels to ensure they are within the appropriate range for Guppys. It is also recommended to perform a partial water change and clean the tank to maintain good water quality. Lastly, observe the remaining fish for any signs of illness or distress and address any issues promptly to prevent further casualties. **

Fish species that can be kept in an aquarium with neons, guppys, and bitterlings include small, peaceful community fish such as Corydoras catfish, cherry barbs, and dwarf gouramis. These species are compatible with the peaceful nature of neons, guppys, and bitterlings and will not outcompete them for food or territory. It is important to ensure that all fish in the aquarium have similar water parameter requirements to maintain a healthy environment for all inhabitants. **

In a 70-liter aquarium, it is recommended to keep around 6-8 corydoras catfish along with 6 Endler Guppys. Corydoras catfish are social creatures and do best in groups of at least 6 individuals. Keeping a smaller number of corydoras in the tank will allow them to exhibit their natural behaviors and thrive in the aquarium environment. It is important to consider the adult size of the fish and their space requirements when determining the stocking levels in the tank. **

Living alone in a 2-room apartment with a housing allowance certificate is possible, but it would depend on the specific amount of the housing allowance and the cost of rent in the area. It's important to carefully budget and consider other expenses such as utilities, groceries, and transportation. Additionally, it's advisable to have some savings for unexpected expenses or emergencies. Overall, with proper planning and budgeting, it is possible to live alone in a 2-room apartment with a housing allowance certificate. **