my guppies haven't stopped breeding

[boxer5397]

Ive my tank to for 1 years and 3 months and my guppies haven't stopped breeding but suddenly my guppies have stopped breeding and i dont know what to do, can you guys help me!
My temp is 26 celcius and my pH is about 6.8


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hp 60xl ink

 

[albirdy]

genetic variation.

 

[kog]

swap some with someone else, theyre probably too inbred by now..