StandbySetting
Fish Aficionado
The same question could be posed to an online retailer, I went through hell with my Live Rock which came from Charter Aquatics, mine came with Isopods which were killing my fish which is why I gave up.
With the LR from the guy on aquarist classified, just be wary of it! Personally when I was looking to buy from there I asked to see pictures of his tank and the rock, what his parameters were in the tank, if he ran a phosphate remover (if he hasn't it can cause problems as it leeches from the rock) Also most important is DO NOT pay by a gift! Make sure you pay via normal paypal as otherwise you have no comeback if he doesn't send the rock etc.
Is he delivering himself or posting it?
I would say go with the white coral sand, I have coral sand and it is a lovely colour, not entirely sure its called white but it is very very light!
Not sure on powerheads Im afraid as I know normally it is 20x turnover but don't know how different it is for seahorses!
I have just started another topic on Salt (Types and Quantities) HERE.
Salt is, i think, the first purchase i'm going to make.
Good choice of salt
Just use the time to research and plan, it will go swifttly and you will be better prepared
Seffie x