Factors that affect the reproduction rate of CRS

Dear all,

Need your advice on possible factors that affect the reproduction rate of CRS.

I have a heavily planted tank with around 50 pcs of CRS. Very few offsprings for the past six months. The following are my setup.

Tank: 4ft by 1.5 ft
Substrate: ADA Amazonia (approximately 1.5 inches thick)
Plants: Seaweed (Coral Pelia ?? not sure of the name) Covering 90% of the tank's floor and backwall
Food: Pellet food from Shirakura (feed twice daily)
Chiller 24.5 degree
2 sponge filters (air pump - quite strong current)
CO2 approximately 30 bubbles per min
PH - 6.2 - 6.7
2 T5 lights switch on 6 to 8 hours per day
2x2028 Eheim filters (sponge, ceramic rings and eheim substrates)
White Powder and Microorganism powder added daily
Liquid Minerals added weekly.
20% Partial Water change weekly(Aged water)

There are no casualties in my tank but they are not productive.

Hope you can enlighten me of factors that may affect the production rate

Thanks
Regards
Nbs

maybe they r more male than female?

[silane]

Originally Posted by nbs

Dear all,

Need your advice on possible factors that affect the reproduction rate of CRS.

I have a heavily planted tank with around 50 pcs of CRS. Very few offsprings for the past six months. The following are my setup.

Tank: 4ft by 1.5 ft
Substrate: ADA Amazonia (approximately 1.5 inches thick)
Plants: Seaweed (Coral Pelia ?? not sure of the name) Covering 90% of the tank's floor and backwall
Food: Pellet food from Shirakura (feed twice daily)
Chiller 24.5 degree
2 sponge filters (air pump - quite strong current)
CO2 approximately 30 bubbles per min
PH - 6.2 - 6.7
2 T5 lights switch on 6 to 8 hours per day
2x2028 Eheim filters (sponge, ceramic rings and eheim substrates)
White Powder and Microorganism powder added daily
Liquid Minerals added weekly.
20% Partial Water change weekly(Aged water)

There are no casualties in my tank but they are not productive.

Hope you can enlighten me of factors that may affect the production rate

Thanks
Regards
Nbs

Temperature is the main factor, it seems that your temperature is ok. Or your themometer is out?

I will double check the temperature. Using TECO chiller(just brought last year). Thanks.

For me, strong turbulence of my sponge filter does not work well with crs. Ill try tuning down the aeration frequency to minimize distractions for the shrimps.

Mine has the same issue with you previously, but once I adjusted the temp from 23'C to 25'C, and the pH from 6.4 to 6.6. They start to get pregnant.

Originally Posted by TCL

Mine has the same issue with you previously, but once I adjusted the temp from 23'C to 25'C, and the pH from 6.4 to 6.6. They start to get pregnant.

ehh.. does tat means they will not get pregnant if the temp is too cold?

[cheetf]

Originally Posted by nbs

Dear all,

Need your advice on possible factors that affect the reproduction rate of CRS.

I have a heavily planted tank with around 50 pcs of CRS. Very few offsprings for the past six months. The following are my setup.

Tank: 4ft by 1.5 ft
Substrate: ADA Amazonia (approximately 1.5 inches thick)
Plants: Seaweed (Coral Pelia ?? not sure of the name) Covering 90% of the tank's floor and backwall
Food: Pellet food from Shirakura (feed twice daily)
Chiller 24.5 degree
2 sponge filters (air pump - quite strong current)
CO2 approximately 30 bubbles per min
PH - 6.2 - 6.7
2 T5 lights switch on 6 to 8 hours per day
2x2028 Eheim filters (sponge, ceramic rings and eheim substrates)
White Powder and Microorganism powder added daily
Liquid Minerals added weekly.
20% Partial Water change weekly(Aged water)

There are no casualties in my tank but they are not productive.

Hope you can enlighten me of factors that may affect the production rate

Thanks
Regards
Nbs

Seem to have similar problems, common factor here is the seaweed. Any brothers have the same problem with the same plants?

Originally Posted by cheetf

Seem to have similar problems, common factor here is the seaweed. Any brothers have the same problem with the same plants?

hi,

i don;t think the seaweed is the main problem .there are bros here who have alot of seaweed in his tank and still it breed.

Thank you for your inputs. Would like to suggest this hypothesis: Due to overcrowding of plants that covered the floor, the newly born shrimplets do not have sufficient supply of "micro-organism" that are found in the substrate. That resulted in poor reproduction/survival rate. This may be a silly hypothesis with no scientific support. Just an observation made when comparing this tank with another tank, with higher reproduction rate, that is also very congested with plants but with greater surface area of the floor being exposed. Anyone has similar experience?