Sgooosh, please tell us a little more about your setup. What kind of filter are you using? Do you have gravel or sand, and what kind? Plants? How long was your old tank set up? Do you have a plan for cycling the new tank?
old:
15 gal
tetra whisper ex30
gravel( some old gravel i found and caribsea eco complete)
super simple( i moved all plants to big tank exept for a tiny java fern)
conditions: everything fine, kh 120ppm, ph 7-8
guppies,2 swordtails, 2 horned nerites, 1 golden mystery snail, some bladder snails
half a year or more than half a year
new:
75 gal
marineland magnum polishing internal filter
bottom layer: black lava
top layer: black diamond sand
deco layer: smooth river rocks
simple( the plants from 15 gaal were barely anything lol)
conditions: i think its sycled, the water is fine
no nothing, kh is 40 which im worried aebout, ph 7-8
planning to move the stuff in
plannning to breeed them and add more stuff
plants:
anubias 1 big one small
lots of stem plants
1 almost dead baby java fern(it melted

)
1 big water lettuce 1 small
some duckweed
a few salvinia(might have lost it)
3 medsize moss balls (raised from 3 small size)