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I'm a simple guy, once in a blue moon when I see him not hiding, I need to have a photoshoot

Is it safe to use the same water as your old fish for new ones? As long as you clean everything inside, hides, fake plants, gravel, etc?

Before the rundown of the issue, here is the stats anyone may want *(Please Note: I understand tank MIGHT be overstocked, or will be soon, and thus have been moving, and trading guppies, to reduce population)* Tank size: 20gallo pH: 8.2 ammonia: 0 nitrite: 0 nitrate: 5 currently(never more...

So my dwarf grass is growing fine, what my angelfish don't rip apart that is. I'm going to just remove the majority of it all and get perhaps a few tall growing plants. Any suggestions?