ok so i did an extra 0TDS 2 liter water change on the Large 42 liter tank just to get the TDS within range of the other Small 12 liter tank and here are my readings:-
Small (old) tank
TDS - 239
Temp - 23C
PH - 7.5
NH4 - Unreadable
N03 - 1PPM
N02 - 0.025PPM
P04 - 0.5PPM
dKH - 3
dGH - 7
Large (New) Tank
TDS - 232
Temp - 28C
PH - 6.5
NH4 - Unreadable
N03 - 1PPM
N02 - 0.025PPM
P04 - 0.5PPM
dKH - 1
dGH - 8
so other than PH i've gotten the tanks pretty much the same conditions. im thinking my tank is now cycled enough to take out the prawn & introduce Tyrone? oh and the tanks starting to grow algae on one of the plants im feeling the need to tackle before it gets too bad? but the plus note is the dwarf hair grass i got is already expanding.