I am so sorry to hear of your misfortune.
Hydroponics, as you have found, is not kind to the newb. Very finicky, delicate. I deduce that you are indoors, from your hydroponics venture. The next thing you ought to share with us is the importance of organics to you. This answer will steer you in one of two directions. I use organics. In my opinion, the taste is without comparison. Many successful gardeners use chemicals, and thus require different things from their medium.
If you decide on organics, and do not have your own compost, I urge you to find a local soil/compost company that has or is organic(s). Many of these companies sell only wholesale to retailers, yet some allow bulk orders for individuals without a wholesalers number. Either way, they will inform you of a local retailer if you ask. You will want a high quality mix very low on nutrients, or none at all. You will want a mix with excellent drainage, and plenty of air flow. You can do this on the cheap(er) if you get soil, peat, vermiculite, etc... separately and make your own mix. Recipes for this are negotiable, hotly contested, and all over this site.
If an organic lineup of nutrients is not in your arsenal, and chemicals are
then you'll have to wait for another to chime in and help you.
No matter what your route, stay away from Miracle Grow soils, and any product with time released nutrients. This will harm your plants after about a month or so by burning them with too much food, and flushing a mix with time released nutes will undoubtedly bring about a PH issue.
I am a long winded fella, and you asked for a brand name... not fair. i gave one brand name and advised against it! I am sorry. If I tell you my brand, it will be a dead giveaway to my locations general area as the locale is in the name. With no brand loyalty, the three best things are 1.) local, 2.) local, and 3.) local.
I hadn't heard of my brand until I looked locally, and Ive never been happier with big names, heavily marketed pretty labels. We as consumers absolutely do pay for marketing and labeling in the purchase price. Support your local industries and businesses. They value your patronage more sincerely, they are more accessible, and they need to prove themselves over the industry leaders.