My 170L tank (recently learned that it's a discontinued model - a Juwel Panoramic - for anyone wondering) has a sharp-ish gravel as its substrate and an area to the right with smooth pebbles. As some of you know I keep kuhli loaches, corys and plecos* in this tank, which I'm aware need sand rather than gravel to properly thrive. I'm starting to get increasingly worried about damaging their undersides, and I'm hoping to get some more catfish in the future so I'd like to make the newcomers as comfortable as possible. Is it too late to switch out my gravel for sand?
Any advice and/or recommendations would be very helpful!
And... In the mean time, would it be worth moving these fish to my 54L that already has sand? It's currently quarantining three female guppies and two upside down catfish, but once the quarantine is up I'd probably be able to move them in.
*2x plecos (one sailfin and one common that will be rehomed soon)
6x corydoras aeneus (3x albino 3x bronze)
3x kuhli loaches (getting more when I have the space + money)