Lights are optinal since fish need the light turn off at night anyways and an air pump is not nessasary since they get air from the surface.
1	Lights	light	NOUN	NNS	Number=Plur	3	nsubj	3:nsubj	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	cop	3:cop	_
3	optinal	optinal	ADJ	JJ	Degree=Pos	0	root	0:root	_
4	since	since	SCONJ	IN	_	6	mark	6:mark	_
5	fish	fish	NOUN	NNS	Number=Plur	6	nsubj	6:nsubj	_
6	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	advcl	3:advcl:since	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	8:det	_
8	light	light	NOUN	NN	Number=Sing	6	obj	6:obj|9:nsubj:xsubj	_
9	turn	turn	VERB	VBN	Tense=Past|Typo=Yes|VerbForm=Part	6	xcomp	6:xcomp	CorrectForm=turned
10	off	off	ADP	RP	_	9	compound:prt	9:compound:prt	_
11	at	at	ADP	IN	_	12	case	12:case	_
12	night	night	NOUN	NN	Number=Sing	9	obl	9:obl:at	_
13	anyways	anyways	ADV	RB	_	9	advmod	9:advmod	_
14	and	and	CCONJ	CC	_	20	cc	20:cc	_
15	an	a	DET	DT	Definite=Ind|PronType=Art	17	det	17:det	_
16	air	air	NOUN	NN	Number=Sing	17	compound	17:compound	_
17	pump	pump	NOUN	NN	Number=Sing	20	nsubj	20:nsubj	_
18	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	20	cop	20:cop	_
19	not	not	PART	RB	_	20	advmod	20:advmod	_
20	nessasary	nessasary	ADJ	JJ	Degree=Pos	3	conj	3:conj:and	_
21	since	since	SCONJ	IN	_	23	mark	23:mark	_
22	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	23	nsubj	23:nsubj	_
23	get	get	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	20	advcl	20:advcl:since	_
24	air	air	NOUN	NN	Number=Sing	23	obj	23:obj	_
25	from	from	ADP	IN	_	27	case	27:case	_
26	the	the	DET	DT	Definite=Def|PronType=Art	27	det	27:det	_
27	surface	surface	NOUN	NN	Number=Sing	23	obl	23:obl:from	SpaceAfter=No
28	.	.	PUNCT	.	_	3	punct	3:punct	_
