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ganesan
02-13-2014, 12:53 PM
I saw packets of crushed mosaic stones which is used in cichlid tanks as substrate. They are white colour in the cichlid tank at the LFS and look nice. Can I use this substrate for a discus tank or would it make the water hard and is not the right choice.
The LFS owner says you can use it if you add water softners. I am not sure about this.

SMB2
02-13-2014, 01:15 PM
Don't complicate matters. Why make WCs more difficult? Adding chemicals to your water just shouldn't be necessary unless you have strange tap water or want to use RO for breeding purposes. Also if you are going to add a substrate try to replicate what Discus might enjoy when picking around for food. Their mouths are designed for muddy/sandy substrate. Also think about what is easiest to keep clean.

Second Hand Pat
02-13-2014, 01:58 PM
Stones as you describe will allow food and poop to collect between the stones leading to water quality issues. I would suggest sand where stuff tends to stay on top making it easier to clean.

ganesan
02-16-2014, 06:45 AM
Thanks for replies.guess its not a good idea