Hello Myrrhiam,
as long as you have access to alder cones and some dry oak or beech leaves, you should be perfectly fine 🙂 Just do not be afraid to use enough, there is no way you could harm paros with such natural substances. I would suggest covering the bottom with the leaves (no big layer, just a cover to avoid anoxic decomposition), beech leaves look better and suprisingly last longer) and adding a fair handful of aldercones for every 2.5 galons of water to start with. Thereafter just add more if needed. You may need more to develope eggs successfully, as your total hardness is a little higher than necessary, so chances are that you will have to go down to 5 with pH for this particular reason. But anywhere under 6 the fish will be already fine and it is just a matter of time for the eggs to develope in future attempts. You will see how fish like the new water 🙂 Best wishes!