how much r these tester kits for water and r they really easy to use??? as when my tank is cyxled i think its best if i buy 1 in so i make it all safe also im just gona buy diffrent tiger barbs have a nasty tank will shouls of 10 be ok?
You will find that most folks recommend the API master kit. I have one and it is very easy to use and extremely accurate.
They cost upwards of $35-40 USD at local fish stores BUT you can find them online for less than $20 as lan H mentioned below. Check out the PetCo site. They are offering free shipping for orders over $50 and I think 10% off all orders.