what size tank is it why do you use the anchor points and some rachet straps
there is a bloke in chard that sells metal frames and straps .I made my own and I have just finished mine and am going to put on small video in the next few weeks if you want a laugh http://www.ebay.co.uk/itm/350-litre-upright-tank-frame-kit-/160412518134?pt=UK_HomeGarden_CLV_Cleaning_CA&hash=item255954c6f6