Restoring tank

[Zeth]

Hi, I have this old tank, 1o gal, the substrate is azoo grower bed, originally it had ph of 6.4 but beacuse I never changed the water or siphoned it, and just aded more and more water, now its ph is 8, I instaled 5 Chrom and they layd eggs but I didnt know that, today I was about to change that tank substrate, and saw little fish there, how can I just restore the ph of water to make it nice for Chrom, they need 6.5-7, the tank has some java ferns, mini pellia, java moss, and one anubia, little yeast co2 and light,My new plan is syphon the gravel to take dirt from 4 years and add coconut coir, any sugestions?

[evelyn80]

:repost: that makes no sense... to me anyways

[Bk828]

not fully understand the whole post but to lower the ph you can add peat moss to the filter.

[Zeth]

umm well , the tank has Chromaphyosemion eggs, in substrate,and some new born fish, but that tank ph is 8, the akadama grabel does not acidify water anymore.

[Riiz]

Why do you need to change the pH if the fish are already spawning in it, then it sounds fine?