Yeah green blob is cheato
Skimmer i will probably have to run HOB of either sump or tank as I've found I don't have enough space to fit my MCE 600 in the sump. As there is only about 7" clearance above it and MCE 600 requires 1ft clearance to empty.
I was going to go for shallow sand bed as I heard DSB can cause issues down the line and 1" mineral mud + 1" Sand should supply a similar anerobic enviroment. and mineral mud is supposed to really promote cheato growth.
Heaters will probably end up in Inlet area as this will have massive flow and is away from any live stock.
Trying to avoid reactors but will probably end up running rowaphos or similar.