Ok so i was looking to avoid adding tannins or any other chemicals to it, is there anything else I need to do in order to ensure it does not spoil?
You will get your tannic value from all the seeds on those berries. I also highly recommend using a food grade bucket & putting your fruit in a bag for primary fermentation.
Generally, your tastes may vary, but, start tasting it for the tannic value @ about 7-10 days into primary. Those seeds may be small, but, there's a lot in 8 pounds of berries.

Once you've reached YOUR level of tannins, you can remove the fruit. It will be pale in color by that point, (compared to when you put it in).
To avoid spoilage, sanitize EVERYTHING that will come into contact with your must, including your hands. Good sanitization practices go a long way in mead making.

Keep the fruit wet @ all times. Usually a few good swirls, twice a day will be enough to keep it wet. If it starts to dry out, mold will try to grow. I use these glass fermentation weights & then it's not an issue keeping the fruit wet.
6 Pack - Large glass fermentation...
Amazon.com: 6 Pack - Large glass fermentation weights for wide mouth Mason jars. Preservation and Pickling. Dishwasher safe. Gift box included. Premium Presents brand: Home & Kitchen
Bags can be found here. I get the bigger bags but there are many sizes to choose from. Adding 8 pounds of fruit will take a bigger bag.
Bellamei Brew Bags Reusable 2...
Amazon.com: Bellamei Extra Large Brew Bags Reusable 2 Pack 22"×26" 250 Micron Fine Mesh Bag for Fruit Cider Apple Grape Wine Press Drawstring Straining Brew in a Bag (2 pack-22"×26"): Home & Kitchen
Food grade buckets can be found in the paint section @ any Home Depot store. Look for the food safe label on a solid white bucket.
Lastly, make sure your airlock always has enough liquid in it. Some people use their sanitizer, some people use water. I use vodka. There are bugs that can swim, I have yet to find one that can make it through the vodka



I hope this helps you.
Happy meading
