Beech aquarium and cabinet, included led lights , heater , 2 external filters, 400 liters , tank is 4ft by 2ft by 2ft , lid inside needs bit tlc , but doesn't notice when shut , no scratches on tank

So the pond is filling up at the moment, and I’m going to leave it like this for two weeks or so. So I need a PH kit is there anything else I need before putting koi or gold fish in the pond

Want this but need to get the tank dialed in first

I have about 6 of them now need a couple of new tanks

Anybody know of a big tank for sale?bigger the better asking for a friend.