12-12-2011, 07:10 PM
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Originally Posted by zof
I'm assuming by live sand they are talking about a fresh water system and not salt? In freshwater as far as I've seen we call "Live" the biological filter, while salt people tend to call their biological filter "Live". If this assumption is correct then its usually recommended to let enough of the biological filter establish itself in the filter before you change out substrate so you will avoid a full blown cycle.
I personally like sand in tanks, but if you really want to replace it then gravels a good choice as it allows better water flow through it which leads to a better medium for biological filtration, plus you can gravel vac it to get alot of stuff out.
I decided to go sand and have some areas with gravel (at the back of the tank on the aireators) Should i replace the old sand with new sand since its really old (5 years probably)? should i just add more sand? remove some/addsome?