Replacing A Sand Bed

[Anguilla82]

hi all,

this may sound like a daft question but here goes.

when doing regular water changes i tend to suck up any algae that is on the sand bed and in so doing suck up a load of the sand.
now it is getting to the stage where i don't have masses of sand in the tank any more.

my question is... if i add to the already present sand with a load of new 'live sand' from the lfs will my tank re 'cycle'. i.e. will i get a load of die off of the goodies in the new sand and cause a nitrate spike?

FYI
tank is a D&D 24G Nano with an Eheim canister filter filled with live rock.
tank has being set up in my hands for around 10 months and have a selection of softies and lps

 

[@ombomb]

why not put the sand you syphon out back in...?

if you need to add more, just buy aragonite sand, no need for live