Pillar i assume u are canadian as well considering u posted a big al's site, i have a big al's fairley close to where i live. in my opinion big al's is only good for 3 things.
1 getting a large viriety of healthy fish.
2 talking with knowledageble staff that can actually help u.
3 a large virety of products
as for buying stuff there, i generaly only buy stuff at big als if i cant get it anywhere else. if u go to petsmart or even walmart it is cheaper even if its by a couple bucks, they add up in the long run. another store to look in is pet valu, they are cheaper then big als aswell. im not sure about pj's pets i havent been in there often enough to say anything. but one example is when i went to by my whisper i10 filter i went to the different stores to check prices, at big al's it was 23.99 compaired to petsmarts 12.99, thats almost half the cost