Fertilize ratio

[diamond_discus]

My discus pair spawn twice this past month. Both time the female would lay around 200 eggs. However, most of the eggs were not fertilized and I got only about 30 wrigglers both time. Is this normal ? Or is it because the male is too young (about 8 months old) ? water condition ? too much water current during the fertilized process ?

[pcsb23]

No its not normal, should expect most of the eggs to be fertilised. It could be a number of things, the male seems to be very young at 8 months so that may be one, too much current also, though I have had them fertilise a full batch in a torrent, most likely the male being young or the water being too hard or a combination of the 2.

[diamond_discus]

I don't have a RO unit. I only use tap water, with Discus Buffer and Softener Pillow. Maybe that's why ....

[pcsb23]

Maybe... measure you GH and KH, then we'll know. BTW the softener pillows are next to useless, save your money, time and effort and don't bother with them.

[AADiscus]

I would say all the above. I have noticed with different strains it varies on the males fertilizing at an early age. I would bet it is your case right now. (young male) But you never know. Give him a little while. He will eventually get there or find another male.